Files are skipped for some search strings

[DoctorJools]

I'm searching a particular folder. When I'm searching for the regex

delete\s(from\s)?([)?dbo(])?.([)?T_ClientProvision_History(])?\b

it searches and the status bar at the bottom says "Searched 9270 files, skipped 0 files. Found 0 matches in 0 files." But if I search for the regex

delete\s+(from\s*)?(\w+)(.|\r\n)+([)?dbo(])?.([)?T_ClientProvision_History(])?\b\s+\2\s

the status bar at the bottom says "Searched 8921 files, skipped 349 files. Found 0 matches in 0 files."

Why does it skip 349 files? These results are completely repeatable - it's not that any process has a lock on any of the files.

[stefankueng]

the problem with the second regex is that it needs a lot more memory, i.e. stack space. This then leads to the regex engine aborting the search when it reaches the memory limit. That's when the file is marked as skipped in the search.

[stefankueng]

grepWin needs to show that the regex engine ran out of stack space somehow, not just show the files as skipped.

[stefankueng]

...and maybe increase the regex engines stack space

[stefankueng]

btw: the problem with your regex is the (.|\r\n)+ part. This is a repetition with a branch, and those always make the regex engine use up their stack, depending on the size of the searched file. Instead, simply use .+ and check the box named "Dot matches newline"

[DoctorJools]

Using .+ and "Dot matches newline" worked a treat. Thanks very much for your help.