reading integer values representing an image from file

thanks Tricky sooo much

i wrote --> FILE_OPEN(testing_read);

befor --> if(NOT(endfile(testing_read)))

and FILE_CLOSE(testing_read); at the end

but i got this error (No feasible entries for subprogram "file_open".)

i want to finish reading the file every clk thats why i'm using a while loop and in the next clock the input values change so i want to re-read the same file again with the new rectangular area...

what should i do then..

i really appreciate your help alot..

thanks your patiance,

Niveen