How are these values created? Could they be of different precision?

>I lost some hours this afternoon and now I could separate the code below and bring it here
>
>It's very odd but the code below is returning .F.
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>
>

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>  = MESSAGEBOX (total_min)  && 120  
>= MESSAGEBOX (tMinutos3_tol) && 120
>
>     DO case
>
>                              case total_min <= tMinutos3_tol 
>       
>= MESSAGEBOX(.T.)                       
>
>OTHERWISE 
>
>= MESSAGEBOX(.F.)
>
>endcase
>     
>
>
>
>

>
>
>I also tried: case total_min = tMinutos3_tol, but still returns .f.