How can we write rec. function to pick file from unix machine and start xlang schedule

I would suggest installing Microsoft's Windows Services for UNIX on the BizTalk server machine, which would allow you to see a UNIX directory as if it were a Windows directory. The File Receive function could then pick up the file as normal and submit it to a BizTalk channel with your XLANG schedule as the destination.

Alternatively, you could write FTP scripts on the UNIX side to send the file across to the BizTalk Server (so long as the IIS FTP server is started on the BizTalk server machine). However, the amount of time spent writing and testing the scripts will probably make this more expensive than the small charge for Windows Services for UNIX.

Ramin