/bin/sh: 1: Syntax error: "(" unexpected

-f file
              Read a series of lines from file, performing one LDAP search for each line.  In this case, the filter given on the command line is treated as a pattern where the first and only  occurrence
              of  %s  is replaced with a line from file.  Any other occurrence of the the % character in the pattern will be regarded as an error.  Where it is desired that the search filter include a %
              character, the character should be encoded as \25 (see RFC 4515).  If file is a single - character, then the lines are read from standard input.  ldapsearch will exit when the  first  non-
              successful search result is returned, unless -c is used.

'ldapsearch .... -f "gidNumber={gid}"'

 ldap_bind: Invalid DN syntax (34)
        additional info: invalid DN