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Old January 15th, 2013, 04:44 PM   #4 (permalink)
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According to the User Guide section on pattern matching
"Matches (~)
The right parameter is a pattern which the left parameter is matched against.
Equals (=)
As above, but the two parameters must be numerically equal."

If I interpret that correctly, you fixed it by replacing the operator used to compare numeric values (=) with the one that is to compare strings (~). Got bit by that myself the other day!

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