To manage how errors (or exceptions as they are called) are handled by SeoTools, find the Errors dialog under the Settings menu:
Using this dialog you can control if an error message should be shown and/or what return value to be returned in case of a specific error.
"" can be used as a wildcard to match *Function and Exception.
Determines if the rule is only for this Excel session or permanent (saved in
Rules are processed in the order they are listed.
Manual Error Handling
Error handling can also be controlled in SeoTools.config.xml.
These are the default settings in
<Errors> <Rule MatchFunction="*" MatchException="*" ReturnValue="#VALUE!" ShowMessage="true"/> </Errors>
This says for any function with any exception show the popup with an error message and then return
Pressing "Don't show again" will not show that error again during that session. If you want to permanently control how this error is shown you need to add to
<Rule MatchFunction="XPathOnUrl" MatchException="WebException" ReturnValue="" ShowMessage="false"/>
Rules are read and matched in order as they are written so put the default rule in the bottom.
If you want to have the error message returned in the result of the function: