>>

>>LEN(CHRTRAN(ALLTRIM(myField),"0123456789.+-","") = 0 ;
>>AND OCCURS(".",myField) < 2 ;
>>AND AT("-",myField) < 2 ;
>>AND AT("+",myField) < 2
>>

>
>which wouldn't take care of the order by allowing ".-444+4" as a valid number.


No. ".-444+4" would be flagged as invalid, since AT("-",myField) < 2 = .f. Same for AT("+",myField) < 2


BTW, there is a paren missing; the code should read:

LEN(CHRTRAN(ALLTRIM(myField),"0123456789.+-","")) = 0 ;
AND OCCURS(".",myField) < 2 ;
AND AT("-",myField) < 2 ;
AND AT("+",myField) < 2