CodeView Err Msg: Attempted to Run Protected Mode...

 Last reviewed: November 23, 1994
Article ID: Q85903
The information in this article applies to:
  • Microsoft Windows operating system versions 3.0, 3.0a

SUMMARY

When you start Microsoft CodeView under Windows 3.0 in a 386 enhanced mode MS-DOS session, the following error message is displayed: 

   You have attempted to run a protected-mode application under 386
   enhanced mode. To run the application, exit and run Windows using
   either the WIN /s or the WIN /r command.
However, using WIN with the /s or /r option is unnecessary. To avoid the error message, start CodeView with the /e option, as follows, to tell CodeView that expanded memory is available: 

   cv /e
This information applies to Microsoft CodeView versions 2.35, 3.0, 3.1, 3.11, and 3.14 for MS-DOS, and to Windows version 3.0.

MORE INFORMATION

If, after you receive the error message, you return to the MS-DOS session and wait a few seconds, CodeView may start. To avoid the error message, start CodeView as follows with the expanded memory (/E) option (where <FILENAME.EXE> is the name of the program you want to open): 

   cv /e <filename.exe>
To increase the size of programs that can be loaded into CodeView in conjunction with the /e switch, create a PIF (program information file) for CodeView, and specify -1 for the expanded memory KB limit. This will instruct Windows to give the program all the EMS that it needs.

CodeView will run without the above error message in a Windows 3.0 MS-DOS session in standard mode with the WIN /S option.

For more information, query on the following words in the Microsoft Knowledge Base: 

   memory and requirements and real-mode and codeview and cv.exe

KBCategory: kbother kbinterop kberrmsg
KBSubcategory: win30 winmem
Additional reference word(s): 3.00 3.0 3.0a cv

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Last reviewed: November 23, 1994
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