When a GX is unable to load an external DLL it is linked to, there can be
several problems:
1. The DLL is not in the path. Since you placed it in the Geosoft directory,
we will assume that this directory is in the path and the DLL should load.
2. The DLL is linked to functions in OASIS montaj not available on the
target machine. This can happen if the DLL was linked to a newer version of
OASIS montaj that contains new functions not available in the version
running on the target machine.
3. The DLL is linked to DLLs that are not part of OASIS montaj and are not
available (or not in the path) in the target machine. A classic mistake is
to compile the DLL as DEBUG. This will link it to the debug Microsoft DLL's
that are only available on machines with the compiler installed. All DLL's
should be compiled as RELEASE.
The best way to diagnose the problem is to run "DUMPBIN /IMPORTS MyDll.dll".
This will list all the DLL's required by your DLL. Here is a sample run on
the add_.dll provided as a sample on the GXDEV\C\ADD_ directory:
------------------------------------------------------------
Microsoft (R) COFF Binary File Dumper Version 6.00.8447
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.
Dump of file add_.dll
File Type: DLL
Section contains the following imports:
GEOGX.dll
10002000 Import Address Table
10002080 Import Name Table
0 time date stamp
0 Index of first forwarder reference
22B GtString_SYS
1D App_DisplayMessage_SYS
40D iCheckError_SYS
MSVCRT.dll
10002018 Import Address Table
10002098 Import Name Table
0 time date stamp
0 Index of first forwarder reference
23D atoi
9D _adjust_fdiv
25E free
10F _initterm
291 malloc
KERNEL32.dll
10002010 Import Address Table
10002090 Import Name Table
0 time date stamp
0 Index of first forwarder reference
5D DisableThreadLibraryCalls
Summary
1000 .data
1000 .rdata
1000 .reloc
1000 .text
------------------------------------------------------------
This listing shows that the DLL requires the GEOGX, MSVCRT and KERNER32 DLLs
and the function names required. If any of these DLLs where not in the path
the DLL would not load.
I hope this information will help you track down the problem.
Roger
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