Warning message not reflected by the output

[AndModica]

Hi,
I'm using rMVP to run FarmCPU on RStudio. In a exploratory run to assess the structure of the putput (2 loops with 2 permutations) i recieved this warning:

Notification messages :
 1: In as.numeric(map[, 2]) %in% c(0:max.chr) :
   NAs introduced during automatic conversion
 2: In as.numeric(map[, 2]) %in% c(0:max.chr) :
   NAs introduced during automatic conversion
 3: In max(numeric.chr, na.rm = TRUE) :
   no argument for max ; -Inf is returned

(My machine is in French, so I roughly translated the original: otherwise, I've never seen "NAs introduced during automatic conversion").

Nonetheless, neither the input contained missing data, or the output had any NA and/or infinite at all. When I run the same script by Rscript the log file didn't report anything similar. I also wasn't able to track what the warning is referring to.
What could be the source of the warning?
Thanks in advance for your time

[YinLiLin]

These warnings don't affect the results, thus just ignore it.

[AndModica]

Thanks!