Skip to main content
Solved

Dissolver Upgrade

J
Forum|alt.badge.img

HI,

I use a FME Server 2016 to run different workbenches. For the update on FME Server 2018 I have to upgrade these workbenches, too.

Therefore I upgrade all transformers, which are upgradable. With the dissolver I get some problemes:

old workbench:

new workbench

In the new workbench I get less objects then in the old workbench, but the result must be the same.

The new dissolver has the addional parameters: Connect Z Mode, Tolerance and Aggregate Handeling.

Which are the correct configurations the get the same output like in the old workbench?

 

Thanks and best regards

 

 

Best answer by takashi

I think the new Dessolver should generate the same result as the previous one, by default.

Make sure that the Tolerance parameter is set to 'None' (default).

View original
Did this help you find an answer to your question?

2 replies

david_r
Celebrity
  • david_rCelebrity
  • February 8, 2019

What you're observing is the main reason why FME doesn't automatically upgrade the transformers: to avoid any surprises in transformer behavior due to changes in the underlying transformer algorithm.

Concerning the mentioned settings :

  • Connect Z mode: this is only relevant if you have 3D data (Z values). It is also available in FME 2016 and the default value "First Wins" is identical with FME 2018.
  • Tolerance: This is a new setting in FME 2018. The default value of "None" is identical to the behavior in FME 2016. You can also read more about this setting here.
  • Aggregate handling: in FME 2016 all aggregates were automatically deaggregated. In FME 2018 you can choose to send them to the <Rejected> port instead. If you leave the setting at the default "Deaggregate" it should behave as in FME 2016.

If you still get differences, there are two things I'd recommend:

  1. Create a small sample workspace with data that reproduces the issue and send to Safe support so that they can determine if it's a regression or as expected. You can have both versions of the Dissolver transformer in the same workspace.
  2. Do not upgrade the old Dissolver transformer, leave it as-is in your workspace to avoid any changes in the output.
takashi
Evangelist
  • takashiEvangelist
  • Best Answer
  • February 8, 2019

I think the new Dessolver should generate the same result as the previous one, by default.

Make sure that the Tolerance parameter is set to 'None' (default).

Reply


Helpful Members This Week

Community Stats

31,525
Posts
119,505
Replies
39,151
Members

Latest FME

Terms & ConditionsCookie settingsAccessibility statement

Cookie policy

We use cookies to enhance and personalize your experience. If you accept you agree to our full cookie policy. Learn more about our cookies.

 
Cookie settings
A product of
Safe Software respectfully acknowledges that we live, learn and work on the traditional and unceded territories of the Kwantlen, Katzie, and Semiahmoo First Nations.