I attempted to use ECUHELP KT200 to read a Delphi E87 ECU in an Opel Mokka 1.7 CDTI via OBD but can't write. 
The file is modified dpf egr off read in bench on table in full system but impossible to write it in bench so I try in obd I succeeded in reading but impossible to write the modified file. 


Possible reason and solution:
Bad file...different size
Change your tunner 
Try to do manual.checksum
Read and write on obd

Look, ECUHELP KT200 can read and write Opel Delphi E87 100% yes. 
BTY, for the Opel E87 with the encypted password, please use IO Prog which can calculate 10-bit seed as the key.