read timeout error message

[AlexLoes]

Hello
tfrec is started and gave it output to a script: tfrec -W -e "script.sh".
After tfrec turns a while, I will get the error message: read timeout, nothing else. I receive this error message after 2 or 3 days tfrec turning. My system is on a raspberry pi on the latest raspbian, where tfrec was also compiled.
What does that errormessage mean? How to avoid tfrec to stop?

Thanx