On my pc I'm unable to use the RegExp object at all, though it works on another developer's machine in our group and on our server. I have installed the VBScript 5.6 engine and unregistered and re-registered the vbscript.dll file several times. But I still get the error every time running the line "Set oRegExp = New RegExp". So perhaps its some kind of quirky permissions issue, but I don't know how to troubleshoot it. Can anyone help?