Hello,
I am sorry for contacting you so late. I have been heavily travelling for my work and other facts have kept me away from WDP.
I have tried to change the system to Märklin interface, but the computer then was unable to communicate with the IB, so I returned to the IB setting. However, I realised that the baud rate was set to 2400 and that an option 'default' was available in the configuration dialog. I changed it to 'default' value and since then the problem has not occurred anymore. In turn, I have more spontaneous resets of the IB than before.
Given these facts, I think that the problem is related to a hardware issue.
I will keep you informed if the message appears again.
Regards and many thanks