When opening a company file across a network, you might see an error message that includes H202, H303, or H505. These errors occur when QuickBooks is unable to communicate with the server. To resolve this issue, ensure that all computers, including the server, are configured correctly, and then re-establish a connection.
Intuit recommends 3 solutions for this problem. The first solution may solve your problem, or you may need to try all 3 to resolve the issue. For best results, perform the solutions in the order presented here.
Note: If you prefer not to use the online tools, go to solution 2.
Solution 1: Download, install and run the QuickBooks File Doctor
Solution 2: Edit the Host file
Estimated time: 15 minutes
If the server was detected, but an error occurs when you open the company file on the client computer, this could indicate that the workstation does not recognize the server's IP address. Use the following steps to resolve this:
Solution 3 (optional) : Manually re-establish a connection with the host computer
Estimated time: 30 minutes
Important: In this section, brackets ([ ]) and carets (< >) indicate where to enter your values. For example, if the instruction says to enter ping [hostname], type the word ping and then your host name. Do not enter the caret or bracket characters shown in the examples.
If the port is blocked, hosting could be disabled or a firewall might be blocking access to the port. If a firewall is in use, an IT specialist can enter an exception on the firewall software of the host computer for those ports that are blocked. To configure the Ports and Firewall, please refer to Firewall and Internet security settings for updates and network access. After adding the exceptions for the ports, start QuickBooks.