I ahve my counter/Radlog setup so my counter sends the CPM to Radlog every second and it submits the data every 60 seconds. I recall Dan saying that the best (optimum?) submission time was every 60 seconds. I have my counter send the CPM every second as I use a wireless RS232 transmitter/receiver to get the CPM from my counter to my Radlog computer across the garden. It very occasionally won't receive the CPM for whetever reason so I send every second and record evey 60. This seems to ensure I miss no readings.
I think that the two instances of Radlog running issue is possibly if people are using the audio input for recording the pulses as opposed to RS232 data. Mine too won't open the serial port if I try another instance.