"invalid group reference" error on search/replace

fodiator · 10-31-2015, 05:38 AM

Using the most recent version of calibre, whenever I would like to back reference to a search pattern match using "\1" in the "replace with" field the "invalid group reference" error is displayed

Any idea how to solve it?
THX in advance

theducks · 10-31-2015, 09:47 AM

are you in REGEX mode (on the right)?

did you set a Capture group eg (\d+)

fodiator · 11-01-2015, 06:54 AM

Yes I am in Regex mode.
THX - setting the search pattern in brackets removed the error, but unfortnately I have not found a way to do the job I like to do.

I have some books with title fields containing "author, name - title" while the author-field is empty. So I tried to search for (.* - ) in the title field and to set \1 in the replace line and set ther target field to "author", so that this part is moved - but this does not work.

THX

chaley · 11-01-2015, 08:46 AM

The replacement string replaces the matched portion of the searched-for string, not the whole string being scanned. Because of this your pattern must match everything you want replaced. For example, include a .* at the end to match.

This screen capture shows what I mean.

fodiator · 11-01-2015, 12:11 PM

THX chaley
worked perfectly!

10-31-2015, 05:38 AM	#1
fodiator Member Posts: 21 Karma: 12 Join Date: Sep 2007 Device: Irex ILiad	"invalid group reference" error on search/replace Using the most recent version of calibre, whenever I would like to back reference to a search pattern match using "\1" in the "replace with" field the "invalid group reference" error is displayed Any idea how to solve it? THX in advance

11-01-2015, 08:46 AM	#4
chaley Grand Sorcerer Posts: 12,327 Karma: 8012652 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	The replacement string replaces the matched portion of the searched-for string, not the whole string being scanned. Because of this your pattern must match everything you want replaced. For example, include a .* at the end to match. This screen capture shows what I mean. Attached Thumbnails

11-01-2015, 12:11 PM	#5
fodiator Member Posts: 21 Karma: 12 Join Date: Sep 2007 Device: Irex ILiad	[solved] THX chaley worked perfectly!

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10-31-2015, 09:47 AM	#2
theducks Well trained by Cats Posts: 30,891 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	are you in REGEX mode (on the right)? did you set a Capture group eg (\d+)

11-01-2015, 06:54 AM	#3
fodiator Member Posts: 21 Karma: 12 Join Date: Sep 2007 Device: Irex ILiad	Yes I am in Regex mode. THX - setting the search pattern in brackets removed the error, but unfortnately I have not found a way to do the job I like to do. I have some books with title fields containing "author, name - title" while the author-field is empty. So I tried to search for **(. - )*** in the title field and to set \1 in the replace line and set ther target field to "author", so that this part is moved - but this does not work. THX

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