Reltool try to start library

Question

I'm building a release with Reltool. When I try to start it with boot file I get error:

14:40:49.466 [error] CRASH REPORT Process  with 0 neighbours crashed with reason: {bad_return,{{z_validate,start,[normal,[]]},{'EXIT',{undef,[{z_validate,start,[normal,[]],[]},{application_master,start_it_old,4,[{file,"application_master.erl"},{line,274}]}]}}}}
14:40:49.472 [info] Application z_validate exited with reason: {bad_return,{{z_validate,start,[normal,[]]},{'EXIT',{undef,[{z_validate,start,[normal,[]],[]},{application_master,start_it_old,4,[{file,"application_master.erl"},{line,274}]}]}}}}

But z_validate is a library and I don't want to start it. How can I exclude it from boot scripts?

Answer 1

Your z_validate.app file probably contains a line like this:

{mod, {z_validate, []}}

Remove that, and the application will be treated as a pure library application.

Answer 2

In reltool.config define the release like this (notice the load app types):

{rel, "cmd", "0.1",
 [{kernel, load},
  {stdlib, load},
  {your_app, load}
 ]},

Then when booting up that release (e.g. with ./bin/erl) it will load all applications but will not try to start them.