Sorry for my late answer, but I was on vacation,
Are You sure that You have Pic field in StudentInfo table?
I try Your code & it works.

Here what I try:

CREATE CURSOR studentinfo (picture M, pic G)

clocation=GETPICT()
?clocation
IF EMPTY(clocation)
   RETURN
ENDIF
clocation = ALLTRIM(clocation)
CREATE CURSOR pictemp (pic G)
APPEND BLANK
APPEND GENERAL Pic FROM (clocation) && I prefer to use brackets instead of macro

INSERT INTO studentinfo (picture  ,pic);
           VALUES       (clocation,pictemp.pic)