reading integer values representing an image from file

i got that file_open should be like that --> FILE_OPEN(testing_read,"abc.txt",read_mode);

i placed it after (else of rst)

i also defined these two lines

line 1-->type f_read is file of text;

line 2-->file testing_read: f_read;

and i'm still having this error

No feasible entries for subprogram "READLINE".

either i wrote integer or string instead of text in line 1

i don't know where is the problem.. :(

thanks alot,

Niveen..