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Scripting: Batch Script May Misbehave Randomly

In batch scripting, complex tasks may require storing values in environment variables, and calling other batch files or subroutines.

In this situation the various scripts/routines may malfunction.

One problem to look for is environment veriable reuse.

For example, if a batch file stores values in an environment variable called TMP1 (say), and then calls a subroutine/batch which also stores values in a variable of that name, the original batch will exihibit hard-to-debug behaviour.

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