added nil check for transmission list in populateThrusterValues

main.lua

@@ -426,6 +426,7 @@ local function populateThrusterValues()
             local subnetworkId = peripheral.wrap(thruster.name).getSubnetworkAnchorId()
             for _, transmissionType in ipairs(TransmissionTypes) do
                 local transmissions = peripheral.find(transmissionType)
+                if transmissions ~= nil and transmissions[1] ~= nil then
                     for _, transmission in ipairs(transmissions) do
                         if transmission.getSelfId() == subnetworkId then
                             thruster.transmission = peripheral.getName(transmission)
@@ -433,6 +434,7 @@ local function populateThrusterValues()
                     end
                 end
             end
+        end
         if thruster.power == nil then
             if thruster.type == "thruster" then
                 thruster.power = thruster.thruster.getPower()