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Asked: 2026-05-12T06:52:44+00:00

I’m getting this runtime error R6034 when I try to execute an application in

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I’m getting this runtime error R6034 when I try to execute an application in a Windows 2003 Server.

Microsoft Visual C++ Runtime Library

Runtime Error!

R6034

An application has made an attempt to
load the C runtime library
incorrectly. Please contact the
application’s support team for more
information.

This server had Firebird 2.0 installed, and it works, I uninstalled it and installed Firebird 2.1, but Firebird 2.1 doesn’t work at all.

When I use instclient to see which dll is installed it returns the correct result, which is the Firebird version I’m using 17910:

>instclient.exe query gds32
Installed GDS32.DLL version : 6.3.1.17910 (shared DLL count 1)

I also looked for other dll which could be lost in the system but there’s none, the system is clean, but I can’t get Firebird to work.

If you are wondering why do I need the gds32, it’s because I use the TIBBackupService component and it uses gds32 by default (or worst, hardcoded) so it can’t be changed to fbclient.dll.

Any ideas to solve this are welcome, thanks.

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1 Answer

  1. Editorial Team

    Most probably you have opted to create the legacy gds32.dll in the system32 directory, but the necessary version of the MSVC runtime library isn’t installed. Use the Microsoft Dependency Walker in either the 32 bit or 64 bit version (depending on the Firebird server version) to check which DLL isn’t found. In any case, installing the MS redistributable package should help.

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