How to convert a string to number (unsigned) by preprocessing?

[cesarsj]

For example, I want to convert 'abc: 12345' to number '12345'

I tried with:

1 step: \nabc: (.*)
2 step: Regular expression, parameter '\D+' and Output '/1'

But the exit resulted in nothing.

[Atsushi]

Name: Regular expression
Parameter1: abc: ([0-9].+)
Parameter2: \1

[cesarsj]

It hasn't worked yet, the error below appears. 'abc' was a way of simplifying, the correct one would be the line below Timestamp, where I left your suggestion, with a little more detail: '\nTimestamp of last test: ([0-9].+)'. Thus the error below arose.

Item preprocessing step #1 failed: cannot perform regular expression match: pattern does not match, type "string", value "Model Family: unknown
Device Model: ST4000VX000-1F4168
Serial Number: Z307EQ0C
SMART overall-health self-assessment test result: PASSED
User Capacity: 4,000,787,030,016
No Error Logged: 1
Short tests errors: 0
Timestamp of last test: 1576232101"

[cesarsj]

I did it! This worked: \ nTimestamp of last test: \ t (. *)

[Hamardaban]

Try don't use \n at begin of regex. Or use ".*Timestamp of last test: ([0-9].+)"

[cesarsj]

"Try don't use \n at begin of regex",
Because?

[Hamardaban]

Because of the ambiguity of what line feed is used (\n matches a line-feed (newline) character (ASCII 10)) and whether it is there at all.
At all it is difficult say something on regular expressions not possessing original(!) lines'.
Works? that's nice...