Hi Juuso

Are you running the ##class(Ens.Director).StopProduction() in the same namespace where your production is running?

If you are logging into terminal and your default namespace is not the same as the namespace where the production is running then you will get this error especially if your default namespace is "USER" which is not an Ensemble enabled namespace.

use

zn "{namespace_name}" to move to the correct namespace

if you are uncertain of the namespace name then you can call the utility

d ^%CD

It will prompt you for a namespace. Type in ? <enter> and you will be displayed a list of namespaces. Select the namespace you need to be in and then run your code.

Nigel

When data in the global buffer pool is written back to the database ach block is encrypted and stored. When data is retrieved it is decrypted as it is pulled into the Global Buffer Pool. When data is pulled from the Global buffer pool into your process it remains unencrypted. So there is an implicit cost in encrypting and decrypting the data blocks but this only happens in that single place of retrieval and storing. I can't remember what the cost is relative to not using encryption but it is documented. The same applies to data moving between IRIS and a web page and any tcp based communications

Fortran would be my guise. Fortran is getting a bit of a makeover and there is renewed interest in it. I was reading somewhere the other day and they mentioned that fortran and some of the earliest languages are making a comeback because of their lowlevel interaction with devices and hardware. An art we have long forgotton but there is renewed desire for people to get to the low bits and bytes and fortran is one way

I have been reading a pdf called the Zen of Python which I am going to upload in a seperate article post. The particle lists all of the language constructs in Python and as I was working my way through the document it occurred to me to write a corresponding Zen of ObjectScript which would give the ObjectScript equivalent of each Python example. And by and large much of Python is earily similar to ObjectScript but then I came across some things in Python where two python statements does some really wierd thing and to mimic the.behaviour in ObjectScript would take several lines of code and in all likelihood would be slower than the python code. I'm tempted to whet your appetite here but you'll have to wait until I've done the entire article. I have to confess that some of the python functionality is very clever from an ideological point of view but  I struggled to think of a scenario where I would need such functionality in real life code but there again one of the examples of how objectScript treats strings that I have 10000 times over the years is the statement 

Write "15Apples" + "25Pears"

40

To explain how objectScript treatsthe expression as a numeric 'plus' on the two strings and I giggle quietly as the classroom of developers who know basic or JS expect the result to be either a concatenation or a data type mismatch but I often use the expression 

If '+variable where the variable is either a non 0 numeric or "" especially if variable is passed as a parameter that in the method parameter list defaults the Parana to "" to avoid have to use $get()

Oh ok, I give in, write the following statements in a python program 

Import print 

message = 'It was a bright cold day in April, and the clocks were striking 

thirteen.'

count = {} 

For character in message: 

count.setdefault(character, 0) 

count[character] = count[character] + 1 

pprint.pprint(count)

Note that thirteen.' is on a new line 

It is a nice piece of functionality and I suspect I could write it in two lines of ObjectScript and though I have to tested the execution time I suspect that ObjectScript would be fractionally faster, which if the message was a far longer string

As a matter of interest why do people use #dim? The only time I use #dim is if I am using $classmethod() where I am referencing a classmate that I will only know at runtime, for example I may have several classes that all inherit from some superclass and the sub classes at to all intents and purposes identical and I want intellisense in which ever IDE I am using to list the possible properties or methods because I use long property names which I don't always remember when I come to reference those properties after the $classmethod() and once I have written the code and tested it I remove or comment out the #dim. Is there any other compelling reason to use it?

I never knew about SetZEOF(), I would have done it in a try/catch and in the catch check to see if

catch ex {set tSC= $s($system.Status.GetErrorText(ex.AsStatus())["<ENDOFFILE>":$$$OK,1:ex.AsStatus())}

Quit tSC

And if I were still using $ztrap then I would test $ze["<ENDOFFiLE>"

But I don't use $ztrap anymore 

Nigel

I never knew about SetZEOF(), I would have done it in a try/catch and in the catch check to see if

catch ex {set tSC= $s($system.Status.GetErrorText(ex.AsStatus())["<ENDOFFILE>":$$$OK,1:ex.AsStatus())}

Quit tSC

And if I were still using $ztrap then I would test $ze["<ENDOFFiLE>"

But I don't use $ztrap anymore 

Nigel

Hi I wrote an article for the tech article competition called "Why I love ObjectScript and why I think I might love Python more". It discuses my 35 years of working with MUMPS, then joining ISC as Cache was introduced and my journey through all of the major stages in the evolution of Cache through to IRIS as well as ISC as a company. One of the problems for many companies who use IRIS is the shortage of experienced ObjectScript developers. On the one hand that is advantageous for those of us who have that experience but on the other hand it does mean that I am part of a very narrow niche of specialists. Python is an extremely popular language. It ranks #1 on many lists of top programming languages. It is an interpreted language just like ObjectScript and most importantly it can handle sparse multidimensional arrays i.e. global's and so it is a natural fit to add to our catalogue of language support. R and Julia are the other two. Python has a vast library of programs and functions covering everything from the mundane through to complex mathematical modelling and data science. My view is that for IRIS developers this is just another option available to us along with ObjectScript, SQL, Direct Global Access that we can deploy in the applications we develop where we use the tool that best suits the task we are solving. iSC have embedded other languages such as Basic and MVBasic into their platforms with varying degrees of success. I was around when we were trying to convert Microsoft developers to move to Cache and likewise MVBasic for PICK developers and at the time it made sense to offer scripting languages that made the transition to Cache more attractive but the ultimate aim was to get those developers to adopt ObjectScript. We did the same with support for TSQL for SQL Server users. Where Python, R and Julia are different is that there is no intention to convert developes in those languages to ObjectScript, rather the aim is to introduce these languages to handle the sorts of logic and processing that ObjectScript is not so good at. Given the choice of extending ObjectScript to handle the mathematical underpinnings of Data Science, ML and AI it made far more sense to bring the languages with a proven track record in those areas into our stable of Native Language Support.

Nigel 

Hey, congratulations guys I was  really impressed with your applications. I really liked Dmitri's app for its use of Google Data Studio and Jojn Pan's Alert Dashboard due to its immediate relevance to customers with many Interfaces. All of the entries were commendable as this was as daunting challenge and to even enter required a lot of practical knowledge of areas of IRIS technology that many of us haven't had the opportunity to work with in our day jobs as application developers. But I firmly believe that Analytics, Data Science, ML and AI are the key differentiators in our careers going forwards. Well done all of you. Nigel

Hi i have a Pi from GM with the ubuntu lts server and iris 2020.4 image which i downloaded. It works fine. Just two questions. 

1) if i connect the pi to my router with an ethernet cable it succesfully generates an ip address but when i remove the cable the ip address is lost? How do i fix this. I tried internet sharing via usb but that did nothing at all.

2) if i want to upgrade iris to iris for health 2021.1 and i have downloaded the community version if i for h 2021.1 how do i upgrade the installed 2020.4

I have a second pi on which i loaded ubuntu desktop . I have been able to install various apps such as dbeaver, docker, and some smaller utilies. I have community versions of iris, iris for healh and iris ml all 2021.1 build 215. The documentation says that if i unpack these files i will find an image file but i dont. I get a json file and a whole load of directories with garbled names.

1) do i have to load these into docker? And if so how?

2)is it possible to install the products without using docker? I.e. my base o/s is ubuntu and in the wrc distributions for containers i found these files. If i don't want to use docker will the container versions still work? 

3) If i don't use docker should i just use the arm64 kits from the iris, i for h etc download sites rather than the container site

4) can i run an instance of each simultaneously without docker?

Nigel

I am busy with mine. It is fiendish. Can a quine, having produced a copy of its own source code, delete itself and recreate itself using the output it generated?

I think i have managed to get the report server installed.  The licence details in Discord helped. And the note about not using ! Character in passwords was useful as all my passwords tend to have an ! In them.

I am waiting for my laptop to complete its cleanup and space free up and then i should be able to test it through the smp.

Thanks 

Nigel

This is very cool. Well done.