delete TP program by karel

Hello,

I have created a sub routine in karel to copy TP programs and it works but i would like to delete them when i do not use them.

I have used the instruction:

DELETE_FILE('MD:\'+st_prog_to_delete+'.TP', TRUE, i_Status)

but it doesn't work. I have the following error:

INTP-322 invalid arg val for builtin

does anybody know how to proceed ?

really thanks.

really thanks for both of you for your quick answer.

I have used the clear method, it works perfectly i have just filtered the error 16011.

CLOSE_TPE(open_id,i_Status)

IF i_Status<>0 THEN POST_ERR(i_Status,'',0,2);ENDIF

--delete pasted file

CLEAR(st_to_prog,i_Status)

--Erreur VARS-011 No data defined for program = 16011

IF (i_Status<>0) AND (i_Status<>16011) THEN POST_ERR(i_Status,'',0,0);ENDIF

I have never succeed to use the DELETE_FILE method.