To give you an update regarding the checking that happened today. 

First a short background on the issue. The error was encountered when the new anti-virus was installed on the machine that they were using to print the barcode. 
That is when they encountered connection time out when they tried to print the barcode, as per checking on the error message it has something with the connection. 
Talked to Jovie to discuss the error message sent by Vanessa, as per checking the issue is on the network connection not on the app itself but we are not sure at first we only based our findings based on the error message.
Yesterday we asked Vanessa if we can check the machine that the barcode app is installed but it was cut short because it was already 4 pm at that time and advise via email that we will continue the checking tomorrow.
Today we connected via remote to the same machine at 9:30 am to continue the checking with Jovie. 
We also tried to reinstall a fresh barcode app to the machine but still, the same error occurs.
We tried to change the ODBC configuration based on the google search with the same error message but we still encounter the error, from time to time we were able to search PO# but there is also a time that we can't even search the PO#.
Jovie asked me to install the barcode app on my machine to check if I will be able to search the PO# and get the same error message, after I installed the app I was able to search the PO# and also able to print using the default printer.
Jovie also check the code on the app and didn't find anything unusual that is when we decided to ask if we can perform a system restore on the machine to the earlier point that the new anti-virus was not yet installed.
Ms. Sally is the one who performs the system restoration on the machine.
After the system restore we tried the same process to validate if we will encounter the same error.