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There are occasions where Sqorz is not able to pick up the decoder on the network. While there could be many reasons for this the most common is IP Address mismatch.
In simple terms the IP address of the computer and the IP address of the decoder must line up, if they do not line up and so communication between the two devices is not possible.
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Check the IP address of the decoder and the computer are similar
For self assigned IP addresses the first 2 segments must be the same i.e 169.254.xxx.xxx
For Automatically or manually assigned IP addresses the first 3 segments must be the same i.e. 192.168.1.xxx
If the IP addresses are not similar then this is likely to be the problem