zabbix regular expression to catch wrong data return

[cristifalcas]

I have an item of type float, but sometimes a string is received in case of error instead of a number. How can I make a trigger regexp to fire in this case?

I have no idea now to check for "wrong data type".

Actually this is by design and what I'm trying to do is this: if the data gathering fails, I send the error message in order to see it on zabbix end.

I tried with nodata(time), but this doesn't seem to work

[herta]

Suggestion: why don't you send the error to separate item? If no error, then error-item is blank. Trigger if error-item is not blank.

That way, if you look at the history of your floating point item in a graph, you don't get funny results.

[cristifalcas]

eventually I did just that

Thank you for your answer