^CMake Error at subdir-Common-Test16/CMakeLists\.txt:[0-9]+ \(add_custom_command\):
  TARGET 'custom4' was not created in this directory\.
+
Generated_source1\.txt: # 1a # GENERATED = `1`
Generated_source1\.txt: # 1b # GENERATED = `1`
Generated_source1\.txt: # 2a # GENERATED = `1`
Generated_source1\.txt: # 2b # GENERATED = `1`
Generated_source1\.txt: # 3a # GENERATED = `0`
Generated_source1\.txt: # 3b # GENERATED = `0`
Generated_source2\.txt: # 1a # GENERATED = `0`
Generated_source2\.txt: # 1b # GENERATED = `0`
Generated_source2\.txt: # 2a # GENERATED = `0`
Generated_source2\.txt: # 2b # GENERATED = `0`
Generated_source2\.txt: # 3a # GENERATED = `0`
Generated_source2\.txt: # 3b # GENERATED = `0`
Generated_source3\.txt: # 1a # GENERATED = `0`
Generated_source3\.txt: # 1b # GENERATED = `0`
Generated_source3\.txt: # 2a # GENERATED = `0`
Generated_source3\.txt: # 2b # GENERATED = `0`
Generated_source3\.txt: # 3a # GENERATED = `0`
Generated_source3\.txt: # 3b # GENERATED = `0`
Generated_source4\.txt: # 1a # GENERATED = `0`
Generated_source4\.txt: # 1b # GENERATED = `0`
Generated_source4\.txt: # 2a # GENERATED = `0`
Generated_source4\.txt: # 2b # GENERATED = `0`
Generated_source4\.txt: # 3a # GENERATED = `0`
Generated_source4\.txt: # 3b # GENERATED = `0`$