Peculiar issue with HDF5 API code

Dear Developers,

I am running a code which reads a file using HDF5 API. I get the following
messages during the run:

cn0435:b544:17915700: 13007105 us(13007105 us!!!): CONN_RTU read: sk 47
ERR 0x68, rcnt=-1, v=7 -> 10.1.1.75 PORT L-883b R-e9c6 PID L-0 R-0
cn0430:b282:30b8a700: 13009445 us(13009445 us!!!): CONN_RTU read: sk 26
ERR 0x68, rcnt=-1, v=7 -> 10.1.1.75 PORT L-b26d R-e9c6 PID L-0 R-0
cn0544:24a9:70d19700: 13013352 us(13013352 us!!!): CONN_RTU read: sk 24
ERR 0x68, rcnt=-1, v=7 -> 10.1.1.75 PORT L-bc5e R-e9c6 PID L-0 R-0
cn0476:c159:5e999700: 13011330 us(13011330 us!!!): CONN_RTU read: sk 25
ERR 0x68, rcnt=-1, v=7 -> 10.1.1.75 PORT L-a2b8 R-e9c6 PID L-0 R-0
cn0418:b290:a489f700: 13005508 us(13005508 us!!!): CONN_RTU read: sk 52
ERR 0x68, rcnt=-1, v=7 -> 10.1.1.75 PORT L-cfb5 R-e9c6 PID L-0 R-0
cn0424:b299:a09a4700: 13005487 us(13005487 us!!!): CONN_RTU read: sk 31
ERR 0x68, rcnt=-1, v=7 -> 10.1.1.75 PORT L-95a3 R-e9c6 PID L-0 R-0
cn0412:26de:6c95e700: 13011475 us(13011475 us!!!): CONN_RTU read: sk 46
ERR 0x68, rcnt=-1, v=7 -> 10.1.1.75 PORT L-9fd5 R-e9c6 PID L-0 R-0
cn0409:28e2:bb183700: 13018161 us(13018161 us!!!): CONN_RTU read: sk 48
ERR 0x68, rcnt=-1, v=7 -> 10.1.1.75 PORT L-9c4d R-e9c6 PID L-0 R-0

     I do not get this message when I run the code without HDF5 support.
Can you kindly tell me what this message signifies? Is this hardware
related?

Thanks and Regards
Suman Vajjala