Code Error 800A139A – Expected quantifier in regular expression

Troubleshooting Code 800A139A – Expected quantifier in regular expression

Introduction to Error Code 800A139A

This error code, 800A139A occurs when you attempting to perform a regular expression search.  My suggestion is that there is a problem with the definition of the pattern in the regular expression it self.

The Symptoms You Get 800A139AError Code 800A139A

The script does not execute as you hoped, instead you get a WSH error message.

Category: Microsoft VBScript runtime
Description: Expected quantifier in regular expression
Number: 0x800A139A

The Cause of Error 800A139A

The underlying cause is a syntax error in the definition of the pattern in the regular expression it self.

Option explicit
Dim matches, model, filename, oFSO
Set oFSO = createObject(�scripting.filesystemobject)
Set model = New RegExp
model.pattern = "*\.txt|*\.cpp"
filename = oFSO.getFolder(�path�).File

The Solution

In this example, keep your eye on the dots or periods (.)

In the pattern: "*\.txt " the problem is that the ‘*’ is a repetition symbol of the previous character, and in the above example I the character before the ‘*’ is missing.  Consequently, the solution is to put in a character, this is should be: ".*\.txt"   (and not "*\.txt".)

Your precise solution may vary from this script.  Best to research the pattern matching syntax, for example
= "*\.txt|*\.cpp" .  See also example 800A139B



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