CoCreateInstance fails when COM method calling it was called from

Hi,

I have a COM method that is called from VBA. This COM method in turn
calls CoCreateInstance on a class that is a .NET class with a COM
wrapper around it. This all works fine. However, when I kick off
that VBA routine from a .NET class within an assembly, I get a class
not registered error. When CoCreateInstance is called on that COM
visible .Net class a second time, then there is a security violation.
To try to make it clearer:


This works:
VBA -- > COM --> CoCreateInstance on COM wrapped .NET class


This does not work (And results in a Class Not Registered Error then
a
security error if CoCreateInstance is called again):
..NET class --> VBA-->COM-->CoCreateInstance on COM wrapped .NET class


The .NET assemblies are not in the GAC -- they are in the same
directory.


Any thoughts?
Thanks,
Sherri

RE: CoCreateInstance fails when COM method calling it was called from

VBA and VB6 are not equal. You also should not be able to go from your COM
class (VB6 I am assuming) to VBA.

"ranin02" wrote:

> Hi,
>
> I have a COM method that is called from VBA. This COM method in turn
> calls CoCreateInstance on a class that is a .NET class with a COM
> wrapper around it. This all works fine. However, when I kick off
> that VBA routine from a .NET class within an assembly, I get a class
> not registered error. When CoCreateInstance is called on that COM
> visible .Net class a second time, then there is a security violation.
> To try to make it clearer:
>
>
> This works:
> VBA -- > COM --> CoCreateInstance on COM wrapped .NET class
>
>
> This does not work (And results in a Class Not Registered Error then
> a
> security error if CoCreateInstance is called again):
> ..NET class --> VBA-->COM-->CoCreateInstance on COM wrapped .NET class
>
>
> The .NET assemblies are not in the GAC -- they are in the same
> directory.
>
>
> Any thoughts?
> Thanks,
> Sherri
>
>
>

Re: CoCreateInstance fails when COM method calling it was called from

On Jan 15, 12:23=A0pm, Family Tree Mike
wrote:
> VBA and VB6 are not equal. =A0You also should not be able to go from your =
COM
> class (VB6 I am assuming) to VBA.

The COM classes are all C++. Not using VB6 anywhere, only VBA (within
Excel). There is no problem with the VBA-->COM communication or COM--
>COM wrapped .Net communication. No problem, that is, until the top
level .Net class is introduced.

Thanks,
Sherri

Re: CoCreateInstance fails when COM method calling it was called f

Then I believe you will find that C++ -> VBA gives the problem also.

"ranin02" wrote:

> On Jan 15, 12:23 pm, Family Tree Mike
> wrote:
> > VBA and VB6 are not equal. You also should not be able to go from your COM
> > class (VB6 I am assuming) to VBA.
>
> The COM classes are all C++. Not using VB6 anywhere, only VBA (within
> Excel). There is no problem with the VBA-->COM communication or COM--
> >COM wrapped .Net communication. No problem, that is, until the top
> level .Net class is introduced.
>
> Thanks,
> Sherri
>

Re: CoCreateInstance fails when COM method calling it was called f

On Jan 15, 1:29=A0pm, Family Tree Mike
wrote:
> Then I believe you will find that C++ -> VBA gives the problem also.
>

Not sure what you mean. I am able to launch the VBA macro from my
(C#) .Net assembly just fine, and the macro in turn instantiates COM
classes and calls COM methods just fine, and these COM methods call
CoCreateInstance on pure COM classes just fine. It is only when it
attempts to call CoCreateInstance on a class that is a COM
visible .Net class that it has a problem. So it seems to be a .Net
issue -- it is only when there is .Net on the top AND .Net on the
bottom that it has the problem. If there is .Net only on the top, but
not on the bottom, no problem, and vice versa.

Thanks,
Sherri

Re: CoCreateInstance fails when COM method calling it was called from assembly

regards
the term of conclusion, because of the differences among chronologists. But
all this difference extends only to two hundred years.

724. Predictions.--That in the fourth monarchy, before the destruction of
the second temple, before the dominion of the Jews was taken away, in the
seventieth week of Daniel, during the continuance of the second temple, the
heathen should be instructed, and brought to the knowledge of the God
worshipped by the Jews; that those who loved Him should be delivered from
their enemies, and filled with His fear and love.

And it happened that in the fourth monarchy, before the destruction of the
second temple, etc., the heathen in great number worshipped God, and led an
angelic life. Maidens dedicated their virginity and their life to God. Men
renounced their pleasures. What Plato could only make acceptable to a few
men, specially chosen and instructed, a secret influence imparted by the
power of a few words, to a hundred million ignorant men.

The rich left their wealth. Children left the dainty homes of their parents
to go into the rough desert. (See Philo the Jew.) All this was foretold a
great while ago. For two thousand yea

Re: CoCreateInstance fails when COM method calling it was called f

To tell the truth is useful to those to whom it is spoken, but
disadvantageous to those who tell it, because it makes them disliked. Now
those who live with princes love their own interests more than that of the
prince whom they serve; and so they take care not to confer on him a benefit
so as to injure themselves.

This evil is no doubt greater and more common among the higher classes; but
the lower are not exempt from it, since there is always some advantage in
making men love us. Human life is thus only a perpetual illusion; men
deceive and flatter each other. No one speaks of us in our presence as he
does of us in our absence. Human society is founded on mutual deceit; few
friendships would endure if each knew what his friend said of him in his
absence, although he then spoke in sincerity and without passion.

Man is, then, only disguise, falsehood, and hypocrisy, both in himself and
in regard to others. He does not wish any one to tell him the truth; he
avoids telling it to others, and all these dispositions, so removed from
justice and reason, have a natural root in his heart.

101. I set it down as a fact that if all men knew what each said of the
other, there would not be four friends in t

Re: CoCreateInstance fails when COM method calling it was called from

they are mere
hypocrites.

They are ready to argue that, if God had indeed done such great things
for them, as they hoped, such ingratitude would be inconsistent with it.
They complain of the hardness and wickedness of their hearts; and say
there is so much corruption, that it seems to them impossible there
should be any goodness there. Many of them seem to be much more sensible
how corrupt their hearts are, than before they were converted; and some
have been too ready to be impressed with fear, that instead of becoming
better, they are grown much worse, and make it an argument against the
goodness of their state. But the truth, the case seems plainly to be,
that now they feel the pain of their own wound; they have a watchful eye
upon their hearts, that they did not use to have. They take more notice
of what sin is there, which is now more burdensome to them; they strive
more against it, and feel more of its strength.

They are somewhat surprised that they should in this respect find
themselves so different from the idea they generally had entertained of
godly persons. For, though grace be indeed of a far more excellent
nature than they imagined, yet those who are godly have much less of it,
and much more remaining corruption, than they thought. They never
realized it, that persons were wont to meet with such difficulties,
after they were once converted. When they are thus exercised with doubts
about their state, through the deadness of their frames, as long as
these frames last, they are commonly unable to satisfy themselves of the
truth of their grace, by all their self-examination. When they hear of
the signs of grace laid down for them to try themselves by, they are
often so clouded, that they do not know how to apply them. They hardly
know whether they have such and such things or no, and whether they have
experienced them or not. That which was the sweetest, best, and most
dis

Re: CoCreateInstance fails when COM method calling it was called f

the town the November after his death; but
was not ordained till September 11, 1672, and died February 11, 1728-9.
So that he continued in the work of the ministry here, from his first
coming to town, near 60 years. And as he was eminent and renowned for
his gifts and grace; so he was blessed, from the beginning, with
extraordinary success in his ministry, in the conversion of many souls.
He had five harvests, as he called them. The first was about 57 years
ago; the second about 53; the third about 40; the fourth about 24; the
fifth and last about 18 years ago. Some of these times were much more
remarkable than others, and the ingathering of souls more plentiful.
Those about 53, and 40, and 24 years ago, were much greater than either
the first or the last: but in each of them, I have heard my grandfather
say, the greater part of the young people in the town, seemed to be
mainly concerned for their eternal salvation.

After the last of these, came a far more degenerate time (at least among
the young people), I suppose, than ever before. Mr. Stoddard, indeed,
had the comfort, before he died, of seeing a time where there were no
small appearances of a divine work among some, and a considerable
ingathering of souls, even after I was settled with him in the ministry,
which was about two years before his death; and I have reason to bless
God for the great advantage I had by it. In these two years there were
nearly twenty that Mr. Stoddard hoped to be savingly converted; but
there was nothing of any general awakening. The greater part seemed to
be at that time very insensible of the things of religion, and engaged
in other cares and pursuits. Just after my grandfather's death, it
seemed to be a time of extraordinary dullness in religion.
Licentiousness for some years prevailed among the youth of the town;
there were many of them very much addicted to night-walking

RE: CoCreateInstance fails when COM method calling it was called from

perfectly evident that the soul is material.

222. Atheists.--What reason have they for saying that we cannot rise from
the dead? What is more difficult, to be born or to rise again; that what has
never been should be, or that what has been should be again? Is it more
difficult to come into existence than to return to it? Habit makes the one
appear easy to us; want of habit makes the other impossible. A popular way
of thinking!

Why cannot a virgin bear a child? Does a hen not lay eggs without a cock?
What distinguishes these outwardly from others? And who has told us that the
hen may not form the germ as well as the cock?

223. What have they to say against the resurrection, and against the
child-bearing of the Virgin? Which is the more difficult, to produce a man
or an animal, or to reproduce it? And if they had never seen any species of
animals, could they have conjectured whether they were produced without
connection with each other?

224. How I hate these follies of not believing in the

Re: CoCreateInstance fails when COM method calling it was called f

I apologize, as I appear to have complete misunderstood the problem earlier.
Is the .net class at the bottom of the chain trying to start a new chain?
That is, what is the logic at the bottom of the chain that is different than
on entry?

And, by the way, there are strange postings going on all over this board on
MSDN. I hope this doesn't further confuse the issue!


"ranin02" wrote:

> On Jan 15, 1:29 pm, Family Tree Mike
> wrote:
> > Then I believe you will find that C++ -> VBA gives the problem also.
> >
>
> Not sure what you mean. I am able to launch the VBA macro from my
> (C#) .Net assembly just fine, and the macro in turn instantiates COM
> classes and calls COM methods just fine, and these COM methods call
> CoCreateInstance on pure COM classes just fine. It is only when it
> attempts to call CoCreateInstance on a class that is a COM
> visible .Net class that it has a problem. So it seems to be a .Net
> issue -- it is only when there is .Net on the top AND .Net on the
> bottom that it has the problem. If there is .Net only on the top, but
> not on the bottom, no problem, and vice versa.
>
> Thanks,
> Sherri
>

Re: CoCreateInstance fails when COM method calling it was called f

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Abdellah, prior to archs left and missing, advocates for it,
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Re: CoCreateInstance fails when COM method calling it was called f

On Jan 15, 8:54=A0pm, Family Tree Mike
wrote:
> I apologize, as I appear to have complete misunderstood the problem earlie=
r. =A0
> Is the .net class at the bottom of the chain trying to start a new chain? =
=A0
> That is, what is the logic at the bottom of the chain that is different th=
an
> on entry?
>
> And, by the way, there are strange postings going on all over this board o=
n
> MSDN. =A0I hope this doesn't further confuse the issue!
>

At the bottom level, there is a COM class that is trying to call
CoCreateInstance on a COM visible dotnet class. This COM class is
calling CoCreatInstance on a lot of COM classes, which works fine in
both cases -- both when the chain was initiated by an assembly and
when it wasn't. But when it calls CoCreateInstance on the .Net class,
in the case when things were initiated by an assembly at the top
level, the CoCreateInstance fails with Class Not Registered, then the
next time with a security exception -- it never even reaches the .Net
class in this case. Please note that NOTHING is different from VBA on
down in both cases. The only thing that is different when it works
and when it doesn't is that in the case it works, the VBA macro is
called directly from Excel, and in the case when it doesn't, the VBA
macro is launched from an assembly by calling Application.Run. And in
the case when it doesn't work, calls to CoCreateInstance on regular
COM objects work fine, just the call to CoCreateInstance on the COM
Visible .NET class doesn't work.

I have both assemblies (and all intermediate files) located in the
same directory, and for the time being I gave that directory full
trust with the .NET framework config utility.

Thanks,
Sherri