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You have wrote your request in the wrong place.
PTC eSupport Help is the section about issue or request on how PTC support works.
I'll ask Toby to move this discussion in the right forum for you.
You'll have to give us more information than your screen shot. It's not normal for the geometry to not change when you change a dimension but depending on how you made your sketches and references a lot can be done.
The section shown in yellow has only 2 references the side wall and round boss. When I moved the round boss, the other feature does not follow it even after regenerating. I even went back into the section sketch to see if there was anything failing and there wasn't. The snapshot I included is taken after hitting the green checkmark in the sketch. I did this numerous times convinced that there was an error in the sketch.
Today, I retrieve the model to get more screen captures to explain what's going on but as soon as I enter the sketch snaps to the boss.
I have seen this behavior more than once but it's not repeatable. Prior to me submitting the question and pic, I had moved the boss 3 or 4 times and it regenerated fine.
Creo3 is very buggy and unpredictable.....reminds me of Solidworks