Tag Archives: TryFunction

Fixing Preview Posting: Part 2

In my two last posts, I laid out the technical design of the Preview Posting feature, and then showed how to simplify its design to get around the unwanted behavior of TryFunction.

One thing is obvious from these posts: Preview Posting wants to simulate posting of a document (or journal) to show what the results would be, but without leaving any actual trace in the database. In database lingo – we want the transaction to be rolled back.

Rolling back is no brainer. Simply throw an error, or do a silent abort, Except if there is COMMIT. In that case, no rolling back helps.

I have announced earlier that my today’s post will be about how to nest transactions in C/AL so that an inner COMMIT has no effect on the transaction as a whole, which can still be successfully rolled back.

That’s what this post is about.

Continue reading Fixing Preview Posting: Part 2

TryFunction Lessons Learned from Preview Posting

One of great new functional features of Microsoft Dynamics NAV 2016 is preview posting. It allows you to preview all the entries that would result from posting a document or a general journal.

Preview posting is not a simple thing. If it was, Microsoft would have delivered it years ago. There must be something in particular with NAV 2016 that powers preview posting, so I decided to investigate it and see exactly how it works.

I am not particularly happy with what I found out, but I have also learned some valuable lessons from it. In this post, I’ll share my findings.

Continue reading TryFunction Lessons Learned from Preview Posting

What’s New in NAV 2016: Splitting Atoms with TryFunction

If this was a joke, then it would be one of those good-news-bad-news jokes. So which one do you want first? To stay true to all jokes of this kind, I’ll start with good news first.

Good news is, you now have TryFunctions, that return true if no error happens, and false if an error happens inside them.

And the bad news? You’ll never want to use them.

Continue reading What’s New in NAV 2016: Splitting Atoms with TryFunction