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Here's one way to determine if a class is mapped (i.e. it is in a package whose definitions come from a database other than the default code database for the current namespace):

SAMPLES>w ##class(%Library.RoutineMgr).IsMapped("Cinema.Film.cls")
0
SAMPLES>w ##class(%Library.RoutineMgr).IsMapped("%iKnow.Objects.Source.cls")
1
SAMPLES>

If you pass a by-ref second argument to IsMapped you can also discover what database the class definition is stored in:

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When posts are displayed on the DC homepage they only show the first part of each post. This part is known as the teaser, or the trimmed version. The DC software does its best, but without being given any hint by you it can sometimes produce teasers that are of limited value, e.g. "Hi!"

When composing your post, the Preview button lets you see what the teaser will look like. For example, here's the preview of an initial version of this post:

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Recently I was conducting a remote support session with a site. The desktop they were sharing with me was on a PC configured with German as the native language. Since my German is rather rusty, and virtually non-existent when it comes to computing terms, I was glad to be able to switch the Portal session into English.

This is done from the page that appears when you use the About link:

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Article
· Jun 12, 2017 1m read
Setting the Windows service account

I recently helped a site investigate a problem that appeared after they upgraded their Windows instance of Caché from 2015.1 to 2017.1. A terminal session launched from the server's desktop cube was unable to run OS-level commands using the $ZF(-1) function. For instance, using the no-op command "REM" as follows:

write $zf(-1,"rem")

was returning -1, indicating that the Windows command could not be issued.

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Using Chrome on my Android mobile I can't seem to get to a specific submenu option. For example in the screenshot below I use the menu button to bring up the first-level menu. Then I tap on "COMMUNITY". The second-level menu appears briefly, but doesn't give me time to tap the entry I want ("FEEDBACK") before it decides to take me to the page headed "Connect with Members".

Am I missing a trick, or is this a bug?

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Article
· Apr 24, 2017 1m read
Diagnosing the cause of <PROTECT> errors

If your application is raising <PROTECT> errors and you're finding it hard to work out why, here's a way to get additional information.

First, if auditing is not already enabled, turn it on:

Then use "Configure System Events" (highlighted above) and locate the event named %System/%Security/Protect. In the screenshot below I used the Filter field to do this (type "protect" - highlighted below - and press TAB):

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