Hello madman,
If you are using Windows version of PhotoScan, please check that you have 64-bit edition installed and not 32-bit one.
Also I can suggest to update PhotoScan on all your computers to the version 1.2.5, since the critical bug for Match Photos network task has been fixed there.
In case the issue is related to the node with 2 GB RAM only, you may just pause it, as the tasks distributed among the nodes do not take into account hardware specifications of the available nodes.