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when calling the function libraries_load(),a notice comes out.
Notice: Undefined index: installed in libraries_load() (line 604 of ....\sites\all\modules\custom\libraries\libraries.module).
i set a breakpoint in libraries_load(),i find that source is here(line 580 of libraries.module):" $library = cache_get($name, 'cache_libraries'); ",the object $library can't be get correctly,so $library->data = 0;
how can i deal with it?