Yes that's the old and probably not very interesting topic ...
I can't think otherwise that when Dan 9:25 mentions "the going forth of the word" it means the same thing as 9:23 - "At the start of your (Daniel) entreaties a word went forth".
So the going forth of the word did begin about 537 b.c. The problem is in that in that case 69 weeks or 483 years doesn't lead to anywhere.
So it seems i have 2 options:
1. Daniel was wrong;
2. WT is right.