Here's one I put together to test.
xx= Inputbox ("Start number if not 1",,1)
yy =xx- 5
It dies at the ' yy =xx- 5' line with this message:
CNEXT - CATScriptErrorMessages - ScriptingERR_1002 Execute the script "Macro1.catvbs".
The scripting engine for MS VBScript has reported the following error: Source: Microsoft VBScript runtime error
Description: Overflow Line: 4 Column: 0
See the language reference guide or the V5 Automation APIs documentation.
It seems to relate to the inputbox result because:
xx = 10
yy = xx -5
Works fine when the inputbox is replaced by a simple variable assignment.