Friday, 28 March 2014

Error handling in VBScript

VBScript provides below statements and keywords to handle errors.
  1. on error resume next
  2. Err object - err.description, err.number

Sample code to handle the error is given below

If err.number <> 0 Then
print err.description
print "there  was no error in above statement"
end if

Whenever any error occurs in the script, We get the message window with detailed description of the error.

But when we are executing the scripts, we do not want this message box to appear to come as this will halt the execution of the script.

To prevent message box from appearing, we use below statement above the block of code.

On error resume next
more statements

With On error resume next in placeVBScript runs even though error exists in the code. We can capture those errors using Err object as stated earlier.

When you are debugging the scripts, you should not use On error resume next statement as it will suppress the errors and you will not be able to figure out the issue in your script.

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