Error loading USE or USELSX module: *javacon


 Product:
 All Products > Java > Version All

 Platform(s):
 All

 Edition(s):
 All

 Doc Number:
 1000073
Published 25-Nov-2014
Last Updated: 24-Aug-2020

 Problem

When opening an application or after upgrading your Notes client to version 9.0.1 you get the following error: Error loading USE or USELSX module: *javacon.

 Solution

This problem occurs when you open any of the AGECOM products such as Export Utility, Import Utility, or Agent Monitor, or any other Notes application that uses the Notes JVM. The following list of items are known to cause this issue.

Hotfix for Fix Pack 2
This issue is a known to occur after installing Notes 901FP1SHF182.

To resolve the issue either remove this particular hotfix or apply a newer fix pack (such as FP2 or later).

Incorrectly formatted Java settings in the Notes.ini file
Some Notes applications and Notes Client add-ins are known to incorrectly set the Java settings in the Notes.ini file. For example the following settings are invalid:
JavaMinHeapSize=134.217728Mb
JavaMaxHeapSize=201.326592Mb
HTTPJVMMaxHeapSize=201326592

These should be reformatted as such:
JavaMinHeapSize=256MB
JavaMaxHeapSize=512MB
HTTPJVMMaxHeapSize=256MB

JavaMinHeapSize is larger than JavaMaxHeapSize
The JavaMaxHeapSize should be greater than or equal to the JavaMinHeapSize.

For example the following settings are invalid because the minimum setting is larger than the maximum setting:
JavaMinHeapSize=512MB
JavaMaxHeapSize=256MB

The Notes Client is also known to crash when the JavaMinHeapSize is larger than the JavaMaxHeapSize.

This should be corrected by ensuring the maximum value is larger than the minimum value as such:
JavaMinHeapSize=256MB
JavaMaxHeapSize=512MB

JavaMaxHeapSize is too large
If the value specified for the JavaMaxHeapSize setting is too large it can cause an issue.

For example one customer had the following settings:
JavaMinHeapSize=512MB
JavaMaxHeapSize=2048MB

When the customer reduced the JavaMaxHeapSize to 1024Mb the problem was resolved:

JavaMinHeapSize=512MB
JavaMaxHeapSize=1024MB

Also if the specified settings exceed the amount of physical memory available try making them smaller:
JavaMinHeapSize=256MB
JavaMaxHeapSize=512MB

Re-install Notes Client
If the problem isn't fixed after verifying the above points then there may be an issue with the Notes client. It is recommended the Notes client is re-installed.

Domino Enterprise Connection Services not installed
If this problem is being experienced on a Domino server ensure the 'Domino Enterprise Connection Services' option was selected when the Domino server was installed:



If necessary re-install the Domino server software and ensure this option is selected during the installation process.



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