4GL puzzeling reactions

I'm developing a 4GL application in the C environment (i4gl) and have produced some interesting and puzzeling situations since adding a C function. The function accesses another db for (mailing) address data. First situation: After entering info. and hitting return or ESC key, the cursor moves back to the left field delimiter erasing the entry. It accepts the entry on the second try. What is causing this?? Second situation: Data is brought in from the other db (name, company, dept. address, telephone, etc) and fields are populated. In the process some field delimiters are blown away. Each argument is terminated with \\0 eliminating trailing extraneous characters before leaving the C function. Why is this happening? I'd be most grateful for any suggestions. -- Art Cooper AT&T Bell Laboratories att!ihlpk!wd9aet 708-979-3049