Update USAP to support the RSPARAMSL_255 data type for variants. The following USAP operations may now take advantage of this change: 

• SUBMIT variant using a variant definition file 
• MODIFY variant using a variant definition file 
• DISPLAY variant 
• GENERATE variant definition 
• SUBMIT job from job definition file with inline temporary variant. SAP LOW and HIGH data types to support up to 255 chars
  

These changes are supported for XBP 2.0 and XBP 3.0, but full 255-character support ultimately depends on the SAP function module implementation.