Stock Overflow issue when large file process

Hi All,

we are getting Stock over flow issue when we process more then 2000 Lines Sales Order xml File. another scenario the file size more then 600kb it's not processed..

any solution for below issue

com.sap.b1i.xcellerator.XcelleratorException: XCE001 Nested exception: com.sap.b1i.bizprocessor.BizProcException: BPE001 Nested exception: com.sap.b1i.utilities.UtilException: UTE001 Nested exception: java.lang.StackOverflowError

Thanks & Regards

Sampath..P.T