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Appreciate the info.

Thanks, Ben.

Here's what I learned then:

1. "\" in [] is a literal "\", not an Esc character.

2. It looks to me that
to find "137[", one uses RE "137\["
to find "137]", one uses RE "137]"

Question: when does one need to use "\x<hexdigit><hexdigit>"?
an example would be appreciated.

Thanks ...

My file contained the following 2 lines:
1. source\fi_output_msg.c(408): case INTERROGATE_TRK_REQ_FC: /* fUNCTION CODE 137 */
2. source\library_lookup.c(779): 5142, /* itbl_atan[ 0][137] */

I used POSIX regular expression and found the following:
a. RE "137\x5d" found "137]" in line 2 as ...

Thanks, Ben.

I used RE "STANDALONE[^_]" (RE enabled in the Find menu) to search.
The problem is that "STANDALONE" is not found if it is at the end of a line.

For example,
#define STANDALONE
#define INCLUDE_STANDALONESYM_TBL

With RE "STANDALONE[^_]", "STANDALONE" is found for the second line only.

Is this a ...