Thank you for the quick reply :)
I have too use the ->plugin_exit( each time to return a code (0=OK,1=UNKNOWN,2=CRITICAL,3=WARNING) from the data.
If I rename the $data i have uncompiled result.
File attente de datatable CRITICAL - File attente (ARRAY(0x10841e8) ARRAY(0x1084230) ARRAY(0x1084278))