I'm getting the error " failed to retrieve data". Actually, i created a custom module cmod1. I created many to one relationship with an another module " dmod1" ( cmod1_dmod1_c ). I deleted the relationship ( cmod1_dmod1_c ). I deployed the cmod1 module. then when i open the relationship section of "dmod1" module, then i'm getting an error " failed to retrieve data" , I'm not able to open the page. Any help would be greatly appreciated. I'm using SugarCRM Professional edition 6.5.8. Please help me.