Web application error

There is a problem with running web application.
Env.: E810,JAS server(WebSphere 5.0), Enterprise server - all under windows
After opening form and click on several field correct errors appear about empty fields, but then "WEB CLIENT EXCEPTION" appears(see attached picture).
Following errors present in web server log files:

<font class="small">Code:</font><hr /><pre>
21 May 2007 12:55:06,968 [ Worker Thread - OWVirtual_Thread_Group6 Assigned To com.jdedwards.runtime.virtual.OWVirtual@2f3e5df] ERROR: {com.jdedwards.system.kernel.CallObject} - *ERROR* CallObject@1f1a25dd: Problem executing function [ValidateUDCValue] lib [CRUNTIME] GetProcAddress failed. Please see Enterprise Server log for details. Business function cannot be found user:USERNAME Env:JPY810 </pre><hr />
and following error in Enterprise Server logs:
<font class="small">Code:</font><hr /><pre> COB0000012 - GetProcAddress failed CRUNTIME.dll function _ValidateUDCValue@12 Error = 3 </pre><hr />
This BSFN(ValidateUDCValue) is present in CALLBSFN.dll on server.

Maybe somebody

You said the BSFN is present in CALLBSFN but JDE is looking for it in CRUNTIME. It sounds like the BSFN was defined in CALLBSFN at the time when the build took place and then was changed to CRUNTIME afterwards, so now JDE is looking for it in CRUNTIME when it was actually built in CALLBSFN. Go into OMW and change it to point back to CALLBSFN so JDE will look for it there.

I check this with OMW in different environments, but everywhere BSFN is placed in CALLBSFN, may be it's correct?
And does it mean that in described error application is searching BSFN exactly in CRUNTIME.dll?

Thanks