Generation of notification based on content of text file

[sonavaneu]

To generate mail notification based on content of text file I have
1) Created "Item" with "vfs.file.regexp[/usr2/usonavan/text.txt,Error,]" Zabix 2.2.3
2) Tried create trigger for this item with Function as "Find string V in last (most recent) value. N = 1 - if found, 0 - otherwise".
Here specified V = Error
and N = 1

But on clicking "Insert" button give error as
'Incorrect item value type "Numeric (unsigned)" provided for trigger function "str(Error)" '

Many I know where I have gone wrong?
Is selection of "Function" option is correct?

Thanks & Regards
Umesh

[Atsushi]

Please check your 'Type of information' setting for that item.
Are you selected Character or Text?

[sonavaneu]

Thanks

Thanks a lot Atsushi. My problem solved.