Mac dictation custom commands not working
I have been experimenting with the dictation app a lot recently since some  RSI issues. Had issue with user created commands at first. Not sure if you got yours working yet but we'll add my scenario and fix for general FYI:


multiple choices of the same app in the app List : for example Google Chrome showed up twice. When I created a user command and chose the first Google Chrome app in the list. User created command did not work. When I chose a second Google Chrome option it works. Somehow and I'll have to sort that out I have multiple choices of the same app. So maybe check that.
increased memory: overall dictation working better since I increased memory on my computer from four gigabytes to sixteen. Actually a whole lot better. And I know dictation uses a lot of your memory. For example if you open up Activity Monitor you can see the resources being used and what application using it. And when you're low on memory features in certain applications are sacrificed or affected.


One last suggestion or maybe more of a qualification Beyond your OS what hardware are you working with – ie what type of Mac product an what year–information found in About this Mac