CompuServe Thread

I work for a company that develops software (specifically an expert system shell with add-ons) for various platforms, including VAX/VMS, MeSs-DOS (and soon OS/2), the Macintosh, IBM Mainframe (MVS, VM, CMS, CICS, etc.), and UNIX (currently a Sun Sparcstation). We've got a set of code that should be portable across the platforms, with the system-specific stuff segregated into "edge" code. In order to manage this mess, we need a code management system that will work well across these platforms. We purchased PVCS from Polytron for this, but we discovered the VMS version has problems with files created from the PC version that are stored on the VAX via PCSA v2.1; the problems are sporadic and difficult to reproduce (i.e. it's difficult to make a file act the wrong way), but once a file has been muddled, the problem(s) appear (the PVCS utilities spin-lock and/or crash into the last-chance exception handler). They've got an update coming, but we've been told they're discontinuing the VMS version. Does anyone know of an alternative? Even something that would interconnect CMS, PVCS (it works well on a PC), sccs, and whatever MPW uses would be helpful. Joe