I just recently come across while deploying sample report application on weblogic. and it was giving me error for all of jasper report classes not found in stack trace.
net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file:
C:\MW_WL12C_Domains\test\report32name_1362666859233_104255.java:4: error: package net.sf.jasperreports.engine does