Possible cause and solution:
If one computer is requesting an excessive number of activations, edit the Options file to set a MAX number of licenses for that host computer by adding a line in the following syntax:
MAX [count] [featurekey] HOST [name]
For example, if you wanted to keep the computer "SharedOps" from obtaining more than three activations for RSLinx you would use the following line:
MAX 3 RSLINX.EXE HOST SharedOps