When is it not worth using?

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There are costs and benefits of these approaches. The IDE is much easier for simple models but is currently limited to PCs. The DOS/command line approach is generally better for models in customized environments. A development strategy for more complex implementations

•	Use the IDE to get it right.

•	Debug components of large models using save and restart.

•	Then if more comfortable use DOS/UNIX with batch files such as

GAMS mymodel -codex 1 -lo 0 -s ./t/save1

call myprogram.exe

GAMS moremod -lo 0 -r ./t/save1