Error in compiling SWAT source code files

I am trying to modify the routing modules in SWAT as part of my M.Tech thesis. While I compiling all the source code files of SWAT 2012, compilation compiled with no errors. But when I trying to run the programme, an error like 'Error: Unable to create process(#206)' occured. Can anyone help me to resolve this error?

Thanks in advance.

You will need to look at the code and find out which process it is trying to create. Maybe it depends on external software that is not present.

Compile the code using /DEBUG and step into the code at runtime in order to find the point in the code where the failure occurs. Then work out what external process it is trying to launch.