Request for help in splicing two Rinex observation files

[#NAHA BISWAS ANIK#]

Respected sir/madam,
                                    I am trying to splice two Rinex observation files, but I am not able to merge these two files. I am getting some error. Could you kindly help me to resolve the problem? I will be looking forward to your support. I have attached the rinex files and the error message with this mail.

Thanks and regards,
Anik


Link for the rinex observation files and the error message:

[https://outlook-1.cdn.office.net/assets/mail/file-icon/png/folder_16x16.png]Rinex Files<https://entuedu-my.sharepoint.com/:f:/g/personal/anik001_e_ntu_edu_sg/El3g2WBnsORLji-r3p7_Jt0BwL6empoQ0OLQfO8qMTL1GA?e=5QoQbc>
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