As the title says: Do or have you ever worked on a project for months straight, to almost abandon it because e.g. models do not converge, to finally get “lucky” and get decent results in the end?

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The above just happened to me, where i have been working full-time on something for the past 4 months. Without getting decent results and getting completely out of options, almost thinking the whole project would have failed. To finally find out that in the end, due to some ‘luck’, the model turned out quite well with results where i’m happy with.

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How often does this happen in the field and what are your experiences with such projects?

Is there any advice you would give out to others who are stuck on such a problem?