# MBS FileMaker Plugin 15.3 development

**URL:** <https://the.fmsoup.org/t/mbs-filemaker-plugin-15-3-development/4885>\
**Category:** MBS Plugins\
**Tags:** mbs-plugin-development\
**Created:** [June 1, 2025, 10:14am UTC](https://the.fmsoup.org/t/mbs-filemaker-plugin-15-3-development/4885 "2025-06-01T10:14:00Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![weetbicks](https://yyz2.discourse-cdn.com/flex030/user_avatar/the.fmsoup.org/weetbicks/32/206_2.png) [@weetbicks](https://the.fmsoup.org/u/weetbicks)\
**Post date:** [July 16, 2025, 1:49am UTC](https://the.fmsoup.org/t/mbs-filemaker-plugin-15-3-development/4885/19 "2025-07-16T01:49:32Z")

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Sorry not sure I follow.

Here is an example. I have an interface table in my file. In this type of solution, all layouts are based on an anchor TO which is based on the interface table. However I have many interface table occurrences.

When you create a new calculation, the default TO it evaluates from is always the very first TO that got created in the file. In my case, D\_Interface

I never want to create calcs evaluated from that context. For me the calculations are always evaluated from the context of wherever that calc is used, such as the layout (and thus the relevant TO).

So, imagine I'm creating a new calculation:

 ![Screenshot 2025-07-16 at 1.44.39 PM](https://canada1.discourse-cdn.com/flex030/uploads/fmsoup/original/2X/8/824a54c09df6715b095314d5341af048ac0daca1.jpeg)

By default, the context is set to D\_Interface. "Current Table" by default also always gets set to D\_Interface.

 ![Screenshot 2025-07-16 at 1.44.43 PM](https://canada1.discourse-cdn.com/flex030/uploads/fmsoup/original/2X/d/dc8f875f308e79af87c3cbc9f2d40cea4764a4d0.jpeg)

Now I want to choose the actual correct context for this calculation. I must now select the correct context from the drop-down.

 ![Screenshot 2025-07-16 at 1.44.50 PM](https://canada1.discourse-cdn.com/flex030/uploads/fmsoup/original/2X/e/ec8ec4d99e513624c63f000e8040fb3115d37727.jpeg)

When I set the evaluation context, the left hand side field listing does not update the "current table" TO.

 ![Screenshot 2025-07-16 at 1.44.55 PM](https://canada1.discourse-cdn.com/flex030/uploads/fmsoup/original/2X/6/6168aac45b73c619a35748dc94dfb7a896ceef51.jpeg)

I can't just begin adding fields to this calc, as it then adds them for the wrong context. I must first now go and change the TO on the left to the one at the top before i can start writing the calc.

 ![Screenshot 2025-07-16 at 1.45.03 PM](https://canada1.discourse-cdn.com/flex030/uploads/fmsoup/original/2X/c/c1898de047ea6dd118486cff16b44c845094aaed.png)

You have to do this **every single time** in this case, and it's always the same TO I need to change on the left, and it always gets changed to "Current Table" for the newly selected evaluation context.

I have never understood why when you change a calculations evaluation context can't the current table TO on the left also automatically change. The left hand side is purely for field selection it has no effect on the calculation at all, but it is just a complete nuisance to have to now always change this before I can start building the calc.

hope that clears it up !

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