create view not running

I have created user with create view privilege and other privilege such as

grant select on INV.MTL_PARAMETERS to xxcasco;
grant select on WIP.WIP_ENTITIES to xxcasco;
grant select on APPS.MTL_SYSTEM_ITEMS_B to xxcasco;
grant select on WIP.WIP_DISCRETE_JOBS to xxcasco;
grant select on WIP.WIP_OPERATIONS to xxcasco;

create synonym xxcasco.MTL_PARAMETERS for INV.MTL_PARAMETERS;
create synonym xxcasco.WIP_ENTITIES for WIP.WIP_ENTITIES;
create synonym xxcasco.MTL_SYSTEM_ITEMS for APPS.MTL_SYSTEM_ITEMS_B;
create synonym xxcasco.WIP_DISCRETE_JOBS for WIP.WIP_DISCRETE_JOBS;
create synonym xxcasco.WIP_OPERATIONS for WIP.WIP_OPERATIONS;