progress 4gl - Calling a method from ABL code not working -

when create new quote epicor add item parts form automatically.

i trying using following abl code runs when 'getnewquotehed' called:

run update. run getnewquotedtl. run changepartnummaster("rod tube"). ttquotedtl.orderqty = 5. run update. 

i getting error:

index -1 either negative or above rows count.

this error occurs each line in abl code.

what doing wrong?

that's not proper format 4gl error message (nor @ familiar) i'd epicor application message. epicor support best bet. however... guessing sounds might need somehow initialize thing you're updating.