LoadError: ArgumentError: Package Preconditioners does not have IncompleteSelectedInversion in its dependencies

[UserQuestions]

I get the following error when trying to using Preconditioners on v0.7.0.

LoadError: ArgumentError: Package Preconditioners does not have IncompleteSelectedInversion in its dependencies

After which it suggests that if I don't have Preconditioners package checked out for development, then I may need to report the issue with Preconditioners.

I'm guessing this may have something to do with Preconditioners relying on IncompleteSelectedInversions, which is not a registered package. I assume it refers to: this package.

[mohamed82008]

Yes this is true. Preconditioners.jl does not support v1.0 yet for this reason. I tried absorbing IncompleteSelectedInversions.jl into Preconditioners.jl so I can maintain them together but I am still reluctant to release it until I read the other package fully and understand it to be able to properly maintain it. Which preconditioners are you interested in? I can make a branch for you without this dependency to use with Julia v1.0.

[UserQuestions]

@mohamed82008, thanks! I didn't have a specific preconditioner in mind. I have little expertise in preconditioning, so my plan was just to try out any preconditioners that were easily available and see which worked best for the form of system of equations that I need to solve many times. If there are a set of preconditioners in this package that don't actually use functions from IncompleteSelectedInversion and it's not too much work, a branch without the dependency would really be appreciated!

[mohamed82008]

Sure, I will do it this weekend.

[UserQuestions]

@mohamed82008, thanks! I appreciate it! Out of curiosity, if I clone and install the IncompleteSelectedInversion from GitHub will that work without you needing to create a separate branch?

[mohamed82008]

I don't think ISI is compatible with v1.0 but I didn't check for a while so I may be wrong. I have some local changes which need to be cleaned up and pushed to make that branch.

[mohamed82008]

You can do ] add Preconditioners#v1.0fixes to get the branch that works with Julia v1.0.

[mohamed82008]

You may need to do ] add AlgebraicMultigrid before that too. Travis seems to complain about this package which had a change in name recently from AMG.

[UserQuestions]

Thank you! I will pull down the branch once I have access to my Julia system. This name explains a lot. I was a bit confused because AMG was not compatible with v0.7 when I added it recently (lots of issues when calling functions of adjoints, etc.). This was surprising to me because the commit log on GitHub seemed to show that you had already merged in changes to fix 0.7 issues. Now that I look more closely, these fixes were also accompanied by a Travis name-change to AlgebraicMultigrid, which is why they did not appear in the package AMG. I really appreciate your following up on this. I probably never would have figured that out.

Also, you may want to change the ReadMe on AlgebraicMultigrid to use using AlgebraicMultigrid rather than using AMG. :)

[UserQuestions]

@mohamed82008, to follow up on this. It does appear that you have made edits to AlgebraicMultigrid that allow compatibility with 0.7 (with some remaining deprecation warnings), however AlgebraicMultigrid is not available directly from the package manager. Only AMG is. I don't know anything about how the package manager registry works, but I imagine that something small might not have been edited properly such that AlgebraicMultigrid never made it to the Julia registered packages list. To get the most recent version of AlgebraicMultigrid I had to fork and pull the nightly.

[mohamed82008]

Yes I haven't tested AlgebraicMultigrid.jl on a clean install before. I think something needs to change with METADATA to make it visible to Pkg. @ranjanan might know more about this.

[mohamed82008]

Resolved by the new release.