Hello and welcome to the October 2025 Developer Community YouTube Recap.
InterSystems Ready 2025
By Don Woodlock, Sean Kennedy, Alex MacLeod, Erica Song, James Derrickson, Julie Smith, Kristen Nemes, Varun Saxena, Dimitri Fane, Jonathan Teich, Judy Charamand
By Thomas McCoy
By John Paladino, Mike Brand, Mike Fuller, Peter Cutts
By Stefan Wittmann, Raj Singh
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InterSystems Developer Community is a community of 25,014 amazing developers
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Trying to check date in DTL.

Want to throw a custom error not the default one from the $ZDTH. It does in the try as will write "Error" when testing the DTL but the actual error not showing. Report errors is turned on. I also tried the THROW logic from best practices but that doesn't work either. $SYSTEM.Status.DisplayError(status) does display what the error should be returned.

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When I started my journey with InterSystems IRIS, especially in Interoperability, one of the initial and common questions I had was: how can I run something on an interval or schedule? In this topic, I want to share two simple classes that address this issue. I'm surprised that some similar classes are not located somewhere in EnsLib. Or maybe I didn't search well? Anyway, this topic is not meant to be complex work, just a couple of snippets for beginners.

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Hey Community!

We're happy to share a new video from our InterSystems Developers YouTube:

⏯ Document Server: Improving Performance While Reducing Stored Data @ Ready 2025

https://www.youtube.com/embed/JqCIXcvVxWc
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Window functions in InterSystems IRIS let you perform powerful analytics — like running totals, rankings, and moving averages — directly in SQL.
They operate over a "window" of rows related to the current row, without collapsing results like GROUP BY.
This means you can write cleaner, faster, and more maintainable queries — no loops, no joins, no temp tables.

In this article let's understand the mechanics of window functions by addressing some common data analisys tasks.

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Every thriving community relies on members whose quiet dedication and deep expertise keep it growing stronger year after year. In the InterSystems Developer Community, one such pillar is @Megumi Kakechi, a long-time engineer and support specialist whose 17 years with InterSystems and 9 years on the Developer Community reflect a true passion for helping others learn, solve problems, and innovate.

👏 Let’s take a closer look at Megumi's remarkable journey and her impact on the InterSystems ecosystem.

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Question
· Nov 6
What is MQTT Broker

Hi Guys,

I'm a newbie in term of MQTT clients & brokers, and I've created a MQTT adapter to connect to a broker and I asked our system admin for the user/pass and the URL and this where we got stuck.

The admin is saying that all he has is IP address to the PEM key to the server itself, so my question is, is the broker the server itself and the url is the url to the server or is the Broker an application (eg. Mosquito) that runs in a server and if that's the case and if its Mosquito, where do I find the connection details to it (user/pass & URL) ?

Thanks

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Hi Developers,

Following the resounding success of last year's new contest, we decided to repeat it. Please welcome

🏆 Bringing Ideas to Reality Contest 🏆

Submit an application that implements an idea from the InterSystems Ideas Portal that has status Community Opportunity or Future Consideration, created before the publication of this announcement, and requires doing the actual programming 😉

Duration: November 17 - December 7, 2025

Prize pool: $12,000

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Hi, Community!

Join us in celebrating a milestone: InterSystems Certification is celebrating 1,000 certifications that showcase the knowledge and expertise of InterSystems professionals. Meet our team, see how the program has evolved, and get a discount on your next certification!

Celebrating 1,000 Certifications

https://www.youtube.com/embed/fJib88xIDfw?utm_source=youtube&utm_medium=social&utm_campaign=fJib88xIDfw
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InterSystems FAQ rubric

When exporting using the Export() method of the %Library.Global class, if the export format (fourth argument: OutputFormat) is set to 7, "Block format/Caché block format (%GOF)," mapped globals cannot be exported (only globals in the default global database of the namespace are exported). To export mapped globals in "Block format/Caché block format (%GOF)," specify the database directory to which you want to map them in the first parameter of %Library.Global.Export().

An example of execution is shown below.

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I have a quite complex FHIR Implementation Guide (IG) which is based on several other FHIR IGs. It's likely the versions of IGs conflict with each other.

From what I understand, I would need to load in all the other FHIR IG's first?

I don't actually need FHIR profiles to be in our FHIR Repository - I'm just after terminology and the examples for our test system.

Is it possible to load a FHIR IG just as data? (I think I mean here, ignore the FHIR profiles and dependencies between them)

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Hi, Community!

Looking for an efficient way to allow providers to see whether prior authorization is required? See how the Coverage Requirements Discovery (CRD) module of the InterSystems Payer Services ePrior Authorization solution can help:

Coverage Requirements Discovery

https://www.youtube.com/embed/MY1If1CEjrM?utm_source=youtube&utm_medium=social&utm_campaign=MY1If1CEjrM
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Hi Community,

Please welcome @Henry Pereira as our new Moderator in the Developer Community Team! 🎉

As an active member, Henry has consistently shared valuable insights, supported fellow developers, and driven meaningful discussions across the Community. His deep expertise and collaborative spirit make him a perfect fit to help guide and grow our Developer Community.

Let's greet Henry with a round of applause and look at his bio!

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Hey Community!

We're happy to share the next video in the "Code to Care" series on our InterSystems Developers YouTube:

⏯ From Words to Molecules: How AI Is Transforming Medicine and Beyond

https://www.youtube.com/embed/YK___IalmYE
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InterSystems IRIS Adaptive Analytics version 2025.4.1 is now available from the InterSystems Software Distribution page. This release includes AtScale 2025.4.1 and is compatible with the existing Adaptive Analytics User-Defined Aggregate Function (UDAF) file - 2024.1. New features included in AtSCale's 2025 releases include:

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Let’s shine a light on the amazing authors and contributors of our October Article Bounty! 💙
Huge thanks to everyone who joined in and shared their knowledge.

A special mention goes to those who created brand-new articles and shared their expertise — each received 5,000 points 🎉

1. @Robert Cemper >> "Sample for Beginners with Streams in IRIS"
2. @Vachan C Rannore >> "What I’ve Learned from Multiple Data Migrations"
3. @Harshitha >> "Tips on handling Large data"

And also to those who joined the challenge and helped us in the search for interesting articles (each received 30 points 🙌):

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Hey Community!

We're happy to share a new video from our InterSystems Developers YouTube:

⏯ Building $ZF Modules in Rust with RZF @ Ready 2025

https://www.youtube.com/embed/ZCxVle93VpQ
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Mirror Your Database Across the Galaxy with Seeding

Hello cpf fans! This distraction I used the "seed" capability in IRIS to provision an entire IrisCluster mirror, 4 maps wide with compute starting from an IRIS.DAT in a galaxy far far away. This is pretty powerful if you have had a great deal of success with a solution running on a monolithic implementation and want it to scale to the outer rim with Kubernetes and the InterSystems Kubernetes Operator. Even though my midichlorian count is admittely low, I have seen some hardcore CACHE hackers shovel around DATS, compact and shrink and update their ZROUTINES, so this same approach could also be helpful shrinking and securing your containerized workload too. If you squint and feel all living things around you, you can see a glimpse of in place (logical) mirroring in the future as a function of the operator and a migration path to a fully operational mirrored Death Star as the workload matures.


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Over time, while I was working with Interoperability on the IRIS Data Platform, I developed rules for organizing a project code into packages and classes. That is what is called a Naming Convention, usually. In this topic, I want to organize and share these rules. I hope it can be helpful for somebody.

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Only method/routine executed as "do Method..." is included into $ESTACK.
How can I modify a method or routine that returns a value so it can be included in $ESTACK?
Example upon executing via Studio Debug ($ESTACK is converted to string with ">" delimiter):
Expected: stackstr = %Debugger.System.DebugStub > LogGenerate > Entry > DirChain > Attributes > LogNew > LogSize > LogFormat > LogWrite
Processes DirChain, LogNew, LogSize, LogFormat are executed as "If Method..."

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