>I am trying to print barcode labels using a DOS based version of Loftware Label Maker. The program writes the Barcode data to Comm 4. I call it from FPW26 using the RUN command. It terminates normally but does not print the label and the only indication is that in a status file it mentions difficulty writing to Comm 4.
>If I run the same program manually from a DOS window works great,

Here are some things to try, if only to see where it stops working

1) From FPW command window issue RUN command.com then execute your program
if this works
2) FROM FPW issue RUN yourprogram
if this works
3) compile the program then try again

Also, instead of running the program directly create a batch file and put a pause before the program runs. Just to see if it a some sort of timing issue. Run this batch file from the command window.