What does the "0509-103 The module has an invalid magic number" error message mean?

Document ID : KB000012936
Last Modified Date : 14/02/2018
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Getting an error message : "0509-103 The module has an invalid magic number" on AIX Apache Web Agent install. What does this mean?

Single Sign-On Web AgentIHS Web ServerAIX Operating System

This error can occur on an AIX Apache Web Agent install when there is a bit level mismatch between the Web Agent and the Web Server.


Check the bit level of the IBM IHS webserver and the Web Agent installer that was used.


To check the IBM IHS webserver bit level, run:


# apachectl -V 

Ex. output

Server version: IBM_HTTP_Server/ Apache/2.0.47 

Server built: Nov 19 2009 12:21:35 

Build level: IHS60/webIHS0946.03 

Server's Module Magic Number: 20020903:4 

Architecture: 32-bit 

Server compiled with....


The Web Agent packages are easily labeled to identify which is the 64 bit version.






Using the appropriate installer will correct the error. In this example, the 32 bit Web Agent would need to be installed to match the 32 bit IBM HTTP Server(IHS).