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AAARGH!!! IDL5.2 crashes with CALL_EXTERNAL



AAARGH!!! IDL 5.2 crashes every time I try to call a DLL subroutine with
CALL_EXTERNAL.
I've try to compile the examples given with the IDL distribution (both C and
Fortran) without success.
I've also try to use the DLM utility (idl_tools.dlm) written by Ronn Kling,
that gives a direct access to the routines in a DLL (without having to deal
with a wrapper routine) via the interface EXTPROC_DEFINE, but the result
doesn't change: IDL crashes even when I try to access a system DLL.
I'm drive to think that there is a bug in the version 5.2.
Does anybody succeded to use CALL_EXTERNAL with this version of IDL?

a desperate guy :-(

bye

Stefano