figlik@ihlpl.ATT.COM (Jim Figlik) (12/28/88)
In article <2856@aplcomm.jhuapl.edu> you write: > > Just out of curiosity, has anyone experienced the error: > > "Invalid COMMAND.COM > > COMMAND.COM Not found - System Halted" > > on their PC's? I have a Tandy 1000 myself. I think it is a > hardware problem, however, since I have and OLD 1000, (not > an SE/TX/ etc, but before them) and have made modern modifications. > COMMAND.COM is on my hard drive, and COMSPEC IS set to find > it, but I get the error anyway. I also have an accelerator card, > to make it a 286 machine, and I believe this to be the problem, > but I can't be sure. The error only occurs when I leave > some programs, and try to return to MS-DOS. > It happens in one other game, too, Leisure Suit Larry II, > in the middle of the game. The screen blanks out, and the error > message comes up. > > Any ideas of where this error might come from, or how to > fix it? I believe that you have two problems here. The first is "Invalid COMMAND.COM". This occurs if you've booted off of one version of DOS and then try to execute another version. The second problem is DOS' inability to find COMMAND.COM. The version pointed by COMSPEC is giving you the above error. Thus, my opinion is that you are booting from a COMMAND.COM that is different from the one pointed to by the COMSPEC variable. The obvious solution is to find where the boot version of COMMAND.COM is. You can force it to be the same as COMSPEC by using the SHELL variable in your "config.sys" file (e.g. SHELL=C:\DOS\COMMAND.COM /P). While I'm not familiar with the Tandy accelerator card, I have seen some accelerator software interfere with "normal" use of a machine. Have you tried running the applications that have the problem without the accelerator card? Check the software (if any) that the accelerator uses and any startup parameters. Jim -- Name/Number: Jim Figlik (312) 979-3478 Organization: CAP Gemini America @ AT&T Bell Labs, Indian Hill, IL Elec.Address: {world}!att!ihlpl!figlik Phys.Address: 2000 N. Naperville Rd/IH 6U-212, Naperville, IL 60566-7033