Groovy error: calc script too long

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I'm trying to run a Groovy script to execute a calculation but the calc script is too long:

The Groovy script failed to compile with internal error: Compile Error: String too long. The given string is 131840 Unicode code units long, but only a maximum of 65535 is allowed.

Is there a way to work around this other than to break up the calc script.  I'd really hate to that.

Thanks