AST RESEARCH TECHNICAL BULLETIN TB-0159 04-11-86 TRANSMITTING A FILE WITH 0 BYTES USING AST-3780 AST recommends that users avoid transmitting files with 0 bytes. If the user attempts to transmit a file with 0 bytes, the speaker will beep twice and the following error message will appear at the bottom of the screen. ***PARAMETER ERROR*** check emdat.prm*** r= 62 1=3200 b=8712 q= 0