BinCoder decode error creating Java serialized object. Excpt:java.lang.ClassNotFoundE

In a BPM based implementation we used Java 1.4, Collection framework APIs. The development was carried out in webMethods 6.1, Java 1.4.
We now migrated to webMethods 7.1 (Clustered Environment), Java 1.5. Ever since migration we have been getting the below exception in LIVE/QA/DEV every time an instance of BPM kicks-off:
BinCoder decode error creating Java serialized object. Excpt:java.lang.ClassNotFoundException: ST_FE3B2_STAPP.utils.Table$Line
This error gets logged in server logs. However, instance completes successfully without throwing any exception.
Please help us narrow down the root cause and resolve it asap.

Attached is the Java file I picket from the package’s Source.

Regards,
Manoj
Table.txt (8.69 KB)

Looks like there is no “import” for the “Line” class, no ?