Q: My GAMS system is slow and sometimes the solver does not write a solution file.
When some virus scanner are running you could run into these problems. Try to disable the virus scanner and check, whether the problem disappears. You may also exclude your GAMS project directory (where your GAMS model files are located) from background scan services.
Q: Starting the GAMS IDE fails with an error like “Exception EInOutError in module gamside.exe at 0012FD0A. I/O error 362.” on Windows.
Some virus scanner (here Avast) prevents the IDE from running. Disable the virus scanner.