Created attachment 124290 [details] file with bug Good morning, please, look for H13 doesn't show me the correct result... also h18 h20 h26... Thanks. Mirko.
It is a rounding error due to floating-point arithmetic. Same in all software: https://support.microsoft.com/en-us/kb/78113 Verified by other QA members on IRC. Closing as WONTFIX.
Created attachment 124607 [details] printscreen