Commit Work and Wait

I'm having a problem which seems to stem from the Commit Work and Wait

command. If I try changing certain quotations using va22 the process

appears to work , however on reopening the quote no changes are made. I

get an error message in the update request sm13 ; ( 01 289: There is no

address data for user KSINCLAIR) [this is the person who originally

created the quote]). I also get this error when using bapi

quotationchange followed by bapi_transaction_commit. The quotation

change is successful but the commit fails hence the changes never get

made. I've spent a considerable amount of time trying to debug to find

this but am not doing too well. Any help or info would be greatly

appreciated.