@Olesen From your description, especially the black screen part, this is almost certainly the same issue as is discussed in the Question that Preben provided a link to. So, there has been a plague of this just in the last few days.

@nm A weird thing is that this just started happening to me 2 days ago. And now it's happened 4 times. As you probably realize, I use Maple several hours per day, *every* day, for over 20 years.

And it's not only when the computer is coming back from "sleep"; it has happened while I was typing. 

This started happening yesterday for me (about 30 hours ago). I just had my 4th occurence a minute ago. My experience is exactly as you describe. I'm also using Windows 10. The behavior can also happen while on a help page.

@dharr Yes, here's a few possible corrections:

evalindets(sol, suffixed({_||(Z||(1, 2), B2)}), ()-> n)

or

evalindets(sol, suffixed({_||(Z1, Z2 ,B2)}), ()-> n)

or

evalindets(sol, suffixed({_Z1, _Z2, _B2}), ()-> n)
 

I changed your word "module" to "modulus".

@vs140580 Here is a worksheet with your requested modifications. I've included your 25 basic metrics and the 4 metrics based on edge weights.
 

Download 29GraphMetrics.mw

@vv I vote up also. I know you're aware of this; I only point it out for other readers: Your analysis only applies to real solutions. There are numerous nonreal solutions for which not all the variables are equal.

I combined my Answer for this with my Answer regarding your 15 "A" values and posted it as an Answer to that Question.

Not a single one of your 15 functions make use of the weights. What am I missing? 

@dharr I vote up. You've provided an impressive tour-de-force of Maple's facilities for working with exact polynomials with algebraic-number coefficients. 

@Christian Wolinski Yes, that appears so. As I said above, the "rules" in the OP's leading example do not even represent a function. That's a bit counter-intuitive because "rule" and "function" mean pretty much the same thing in common usage.

@Axel Vogt MaplePrimes Search searches Posts and Questions. As far as I can tell, there's no option for searching Answers, Comments, or Replies. This is very, very bad because the vast majority of useful content on this site is in the Answers. (Posts also contain much useful information, but there are far fewer of them.) The amount of useful-for-searching content in Questions is negligible. Thus, the vast majority of this site cannot be searched in any meaningful way. Thus it has very little potential to be a valuable information resource for the future.

@sursumCorda Many users are probably not aware of the difference between a list(list) and a listlist. The former is a list whose elements are lists; the latter is a list whose elements are lists that all have the same number of elements.

@sursumCorda Going from cycles to rules is trivial, even for cases that aren't permutations:

CyclesToRules:= (C::list(list))-> (c-> (c =~ c[[2..-1, 1]])[])~(C)
:
CyclesToRules([[g, d, c], [e, a], [f, d, c], [b]]);
[g = d, d = c, c = g, e = a, a = e, f = d, d = c, c = f, b = b]

As you say, the a=b obfuscates. The big stumbling block in going from rules to cycles is deciding that a=b can be ignored.

I deleted your recently posted follow-up Question because it's too similar to this one. Indeed, the only difference from this Question is that in the new Question you want D in italics. As noted below, D is a special case.