plugin conflict due to PLUGIN_DIR constant

Hi,

I have a problem with activation on the plugin causing fatal error due to the user of a constant PLUGIN_DIR with a generic name that is already defined by another plugin (which make the same mistake).

I think it would be safier for your plugin to define a constant with a more specific name (as “JMM_PLUGIN_DIR”).

Am I right or do I misunderstand something ?

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