Continue to monitor the issue of NAV with the POS Upload Batch List. After the NAV servers was restarted last night, Ms. Jen advised that they were able to access it until morning. However, around before lunch, it was not responding again will prompt to force close. I restarted the NAV services, but the problem still occurs. Followed up PASI for their assistance, they advised to restart the NAV services and reprocess uploading one at a time only. I informed them that this was already done and issue still persists, waiting again for their feedback.