Error while opening Netting Agreement Page (intermittent issue).

When we open Netting Agreement Page for the first time , it goes into error as '

oracle.apps.fnd.framework.OAException: Could not load application module 'oracle.apps.fun.netting.agreement.server.NetAgreementSearchAM'.at oracle.apps.fnd.framework.webui.OAJSPApplicationRegistry.registerApplicationModule(OAJSPApplicationRegistry.java:337)atoracle.apps.fnd.framework.webui.OAJSPApplicationRegistry.registerApplicationModule(OAJSPApplicationRegistry.java:106)atoracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1399)at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:593)at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:484)at _pages.__oa._jspService(__oa.java:233)...........................oracle.jbo.JboException: JBO-29000: Unexpected exception caught: oracle.apps.fnd.framework.OAException, msg=Application: FND, Message Name: FND_GENERIC_MESSAGE. Tokens: MESSAGE = java.sql.SQLException: ORA-20001: SQL_PLSQL_ERROR: N, ROUTINE, MO_GLOBAL.INIT, N, ERRNO, -20001, N, REASON, ORA-20001: SQL_PLSQL_ERROR: N, ROUTINE, MO_GLOBAL.SET_ORG_ACCESS, N, ERRNO, -20001, N, REASON,