Check to make sure that the results folder is on the local hard drive. This can be done by right-clicking on the study name -> Properties -> Results folder. The default result folder option under COSMOSWorks -> Options -> Default Options -> Results -> Results Folder should also be changed to a user defined folder to prevent this problem in the future.
If the problem persists, check to make sure that the user has read and write permissions to the results folder.
The results file (.cwr) may be too large for a 32 bit computer to handle (2-3GB limit on file sizes in a 32 bit operating system). You will need to take steps to reduce model size or move to a 64 bit operating system.
If you have a pre-defined non-linear result plot from an older run, it may be trying to display results at a time step it does not have data for. Please create a new result plot.
I also got the same error before due to insufficient disk space for the result file (.cwr). To solve this problem, I changed the path of "Result folder" to another hard drive with ample disk space so that the result file can be successfully stored.
Hope it helps.