Target pattern contains no '%'. Makefile

Question

I have searched this problem in google, but still don\'t have some way to resolve a problem. I have 2 Makefiles: One as example and one as my file. Example:

Answer 1

I had this problem if there was a colon in the target file name (i.e. a time stamp), for example:

 all: foo_01:34.txt
 
 foo_%.txt: bar_%.txt
      foobar $< > $@

I had to escape it:

 all: foo_01\:34.txt
 
 foo_%.txt: bar_%.txt
      foobar $< > $@