receiving an error while trying to run report online by selecting multiple shipments

We have a requirement to print a report online in PDF format.
While running the report online by selecting 5 shipments, system is able build the report. However when the shipment count exceeds 5, I get the following error message.

Has anyone faced such an issue before and if so how can this be addressed?
We are in OTM version 6.3.5


oracle.apps.xdo.XDOException: !!Error : trigger 'afterParameterFormTrigger' returns status as 'false'
At
2015-08-14 12:21:05.601
[081415_122201582][][STATEMENT] Logger.init(): *** DEBUG MODE IS OFF. ***
[081415_122201582][][STATEMENT] Setting JDBC Connection
[081415_122201582][][STATEMENT] Template parsing started...
[081415_122201582][][STATEMENT] Data Template ......
[081415_122201582][][STATEMENT] oracle.xml.parser.v2.XMLDocument@283c00d8
[081415_122201582][][STATEMENT] Inside properties Parser...
[081415_122201582][][STATEMENT] xml_tag_case=upper
[081415_122201582][][STATEMENT] debug_mode=on
[081415_122201582][][STATEMENT] Inside parameterParser...
[081415_122201582][][STATEMENT] Parameter_GL_USER Default value: DBA.ADMIN
[081415_122201582][][STATEMENT] Parameter_ROLE_ID Default value: ADMIN
[081415_122201582][][STATEMENT] Parameter_SHIPMENT_ID Default value:
[081415_122201582][][STATEMENT] Inside dataQueryParser...
[081415_122201582][][STATEMENT] Inside dataStructureParser...
[081415_122201583][][STATEMENT] Group ...report
[081415_122201583][][STATEMENT] Group ...G_MBOL_BOL
[081415_122201583][][STATEMENT] Group ...G_MBOL_Stops
[081415_122201583][][STATEMENT] Group ...G_MM_BOL
[081415_122201583][][STATEMENT] Group ...G_MM_ORIGINST
[081415_122201583][][STATEMENT] Group ...G_MM_SPECIALSERVICE
[081415_122201583][][STATEMENT] Group ...G_MM_DESTINST
[081415_122201583][][STATEMENT] Group ...G_MM_SpecialInst
[081415_122201583][][STATEMENT] Group ...G_MM_Additional_Ref
[081415_122201584][][STATEMENT] Group ...G_MM_ShipUnit
[081415_122201584][][STATEMENT] Template parsing completed...
[081415_122201584][][STATEMENT] Setting Data Template
[081415_122201584][][STATEMENT] Start process Data
[081415_122201584][][STATEMENT] Process Data ...
[081415_122201584][][STATEMENT] Executing data triggers...
[081415_122201584][][STATEMENT] BEGIN
Z_RPT_NA_BILL_OF_LADING.P_GL_USER := _GL_USER ;
Z_RPT_NA_BILL_OF_LADING.P_ROLE_ID := _ROLE_ID ;
Z_RPT_NA_BILL_OF_LADING.P_SHIPMENT_ID := _SHIPMENT_ID ;
:XDO_OUT_PARAMETER := 1;
END;