PROGRAMMING ERROR

THIS WAS A MAIL THAT I GOT FROM A PROGRAMMER. IF YOU REQUIRE MORE DETAILS PLEASE ASK ME AS I AM ONLY A NETWORK PERSON.PLEASE HELP

After the recent migration of development server we are not able to create instance/object in certain classes like $p_ci_vrs,$p_ci_pension etc( And not all ). This is the message that we get when we try to create the instance/object:

socs:pop_get_sorted_unique_list[II]