problem in JPEG compression algorithm implementation in MATLAB

i have created code to compress images in matlab , its modification for jpeg , i used to run it from long time , but now i have error when i run it and i forgot how i wrote it can any one help me in this error

[Walter Roberson]

What error are you encountering? Please show the complete error message, everything in red.

[mohammed]

Undefined function or variable 'all2'.

Error in qq (line 122) imshow(all2);

[Walter Roberson]

all2 is not the same variable as All2. MATLAB is case sensitive.