The most common reason is that the encryption dog can't read it. If OA and M 1 are hardware dongles, it is more likely that the dongle will not be recognized. The specific troubleshooting methods are as follows:

1, OA hard encryption dog:

When this problem occurs, you need to check whether the dongle is plugged in the server. If it is not plugged in: If both A and M 1 use hardware dongles, unplug the dog of M 1 at this time, and then try to start the A service. If only dogs with OA can start normally, it is recommended to apply for replacing soft encryption to completely avoid this problem:

2. Soft encryption used by 2.OA:

Check whether the encrypted file is correctly placed in the corresponding path and named correctly.

3. In addition, there may be problems with the dongle damage or plug-in, which makes it unrecognizable. You can use the updatedog program to read dog information on another computer. If you don't understand it, it is likely that the dog is broken. At this time, you need to contact the merchant to apply for replacing the encryption dog. If other computers can recognize it, it may be a server socket problem. Look at another socket.