This error message occurs if you have MetroNub 1.2 from MetroWerks installed. On the Code Warrior CD by MetroWerks, they have a document called "MP API FAQs", which is in their Multiprocessing SDK (Software Developer's Kit). MetroWerks states, "The MetroNub debugger extension must have the size specified in its 'sysz' resource increased to 2,580,000 bytes. Use ResEdit or Resourcer to do this."
Please refer to the CD-ROM disc mentioned above, or the System 7.6 Tech Note published by Developer Technical Support.
The following Tech Info Library article can help you find the Tech Note mentioned here:
Article 24493: "
Apple Tech Notes: What They Are, Where To Find Them"
For the most current information on what SDKs Apple offers, point your web browser to:
http://developer.apple.com/sdk/