This site also defines other possible causes causing the problems with RSM files. Possible problems with the files that are in the RSM format The inability to open and operate the RSM file does not necessarily mean that you do not have an appropriate software installed on your computer.
There may be other problems that also block our ability to operate the ReliaSoft MPC 3 Format file. Below is a list of possible problems. • Corruption of a RSM file which is being opened • Incorrect links to the RSM file in registry entries. • Accidental deletion of the description of the RSM from the Windows registry • Incomplete installation of an application that supports the RSM format • The RSM file which is being opened is infected with an undesirable malware. • The computer does not have enough hardware resources to cope with the opening of the RSM file. • Drivers of equipment used by the computer to open a RSM file are out of date. If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the RSM file should operate with your programs without any problem.
If the problem with the RSM file has not been solved, it may be due to the fact that in this case there is also another rare problem with the RSM file. In this case, the only you can do is to ask for assistance of a professional staff.