Check to see where the path to DOS files is pointing Check base memory Check hard drive space Check for any 0 byte files in the polling and RPRO directories. Rename the difference files in the main and remote. (See below) Try running RemoteM directly Run chkvol to see if user has limited hard drive space. Ask if they are removing locks each night. Delete the image files Delete semaphor.dat Delete the station file Try polling by disk but not writing to the disk so files are created in the directory. Delete polling directory Initialize to Disk Reinstall the software Try to pkzip the file in dos. Swap out modem cable and modem. Try different com port Difference files: SD*.*; RD*.*; TD*.*; CLIDIF*.*; Invendif*.*;