ClassNotFoundException using jxl

Hi All,

I am developing an application to download table data to excel. I am using web dynpro Java 7.0 to develop the application.

I am using Jxl API's for the development. When i deploy the application i am getting the following ClassNotFoundException exception:

java.lang.ClassNotFoundException: jxl.format.CellFormat Found in negative cache .

I have added the Jxl jar file in lib folder of the DC. There are no errors while building the application, but when I do a Development component- -> Build , the added Jxl jar file gets deleted.

I also tried to develop an external library DC and used this as a reference in the actual DC, but the error persists.

Please let me know how to solve this problem.

Regards,

Madhu.