Penzium

Hi, in a project I am using the Labview wrapper of the Snap7 library (last version 1.4.2) for reading and writing data. I have two PLC Siemens S7-1200 that are accessible via OpenVPN connection. I read from both PLC every second and I write a byte to both PLC always every second. The software that I have developed seems to works ok, reading and writing works ok but after some time (12 to 24 hour) I receive a huge number of error 665420 ISO : An error occurred during recv TCP : Connection timed out....