RPC_S_INTERNAL_ERROR (0x800706e6) when call COM method with SAFEARRAY arg

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From: David Morgenlender
Date: Mon, 28 Sep 1998 00:00

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I just implemented a new method in a custom interface in my inproc (DLL) COM
server.  The IDL definition:

  HRESULT TestArray(
        [in] SAFEARRAY(long) *ppsaIn,
        [out] SAFEARRAY(long) *ppsaOut);

I get the identical error when I invoke this method from either Borland C++
Builder 3 or Visual Basic 5:  0x800706e6, which is RPC_S_INTERNAL_ERROR.  A
breakpoint in the method implementation is never reached.  So something seems to
be going wrong within the guts of COM.  I can invoke other methods within this
interface without any problems;  however, TestArray is the only method using
SAFEARRAY arguments.

Everything is running under Win95.

Do you have any idea why I'm getting this error & how to fix it?

=======================================================
Dave Morgenlender
e-mail: dmorgen@alum.mit.edu
=======================================================

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From: dmorgen@alum.mit.edu (David Morgenlender)
Subject: RPC_S_INTERNAL_ERROR (0x800706e6) when call COM method with SAFEARRAY arg
Date: 1998/09/28
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