P4312 - No Memory and File can not be accessed issue

when trying to upload record of more than 500 lines, user facing below issue. please help.

Error 1                 File can not be accessed. Warning         

A form level error has occurred.

CAUSE: ERROR: File can not be accessed.

Solution. . . Change IBM security or authority using the IBM EDTOBJAUT command.

This file can not be accessed with the current IBM authority

for the User executing this request.

ER Details:         

   Form               P42053_W42053B

   Control Id      1

   Control Title Grid (Lot / Serial)

   Event              Col Exited & Changed - Inline

   Line No          15

BSFN Details:    

   Source File    b4000610.c

   Source Line  267

   Error ID          3143

Error 2                No Memory Warning   

A form level error has occurred.