Hello,

I created two custom object for my application and created tabs as well. every thing is visible for me and working perfect

I have admin profile for my self in sandbox where the application is present, i created 2 other profile for users with different permission sets 

In Both the profile and persmision set - i have give different criter but TAB is visible 

but when i log in as a user, all i can see is only one tab for only one custom object out of two - other one is not shown, both the custom object have same setting in profile and permission set 

when i make the tab of object that isn't visible as default object for that app, now when i log in as user - it still tab not visible but salesforce is diaplaying "Insufficient Privileges: You do not have the level of access necessary to perform the operation you requested. Please contact the owner of the record or your administrator if access is necessary" 

I have tried lot of thing non seems to work - if any one has any ideas or suggestion 

would be great help

thanks