Bug when redimensioning multi-dimension arrays?

[SMcNeill]

I'm wondering where those "missing" numbers went and why they're not accessible to the array after redimming to a larger array, and why they return after redimming to the original size. Also, why there are extra zeros in between the existing data after the initial resize.

I think I may take a look at the source code for this...

As I mentioned, you're not printing your whole array.  Here's your actual first array  (REDIM SHARED Grid(5, 5)):

Code: (Select All)

Array Values:

Row  0    0  0  0  0  0  0
Row  1    0  1  2  3  4  5
Row  2    0  6  7  8  9 10
Row  3    0 11 12 13 14 15
Row  4    0 16 17 18 19 20
Row  5    0 21 22 23 24 25

And here's the resized version of it (REDIM PRESERVE Grid(10, 10)):

Code: (Select All)

Array Values:
Row  0    0 21 18 15  0  0  0  0  0  0  0
Row  1    0  0 23 20  0  0  0  0  0  0  0
Row  2    0  2  0 25  0  0  0  0  0  0  0
Row  3    0  7  4  0  0  0  0  0  0  0  0
Row  4    0 12  9  0  0  0  0  0  0  0  0
Row  5    0 17 14  0  0  0  0  0  0  0  0
Row  6    0 22 19  0  0  0  0  0  0  0  0
Row  7    1  0 24  0  0  0  0  0  0  0  0
Row  8    6  3  0  0  0  0  0  0  0  0  0
Row  9  11  8  5  0  0  0  0  0  0  0  0
Row 10  16 13 10  0  0  0  0  0  0  0  0

Now, look at this resized array, and ONLY print the values from (1 to 5, 1 to 5), and see if it doesn't print the results you're seeing, completely. 

Your arrays are from (0 to 5, 0 to 5), which affects them as above.  You're ust printing them from (1 to 5, 1 to 5), and that makes it seem as if values are totally scrambled or even lost.

Remember:  QB64PE arrays are 0-based, unless you specify otherwise.