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Automation example in documentation fails to run; SubScriptOptions : SelectMemory

Solved1.57K views21st April 2022Automation script ScriptMemory
2
Data Miner63 12th April 2022 0 Comments

Copy the example code to the dot from documentation (also below) for SubScriptOptions:SelectMemory(String, ScriptMemory) and then run it raises Script Execution Failure.

How to get this method to work please? Observed in DataMiner 10.1

Script Failure (myParentScript): (Code: 0x80131500) Skyline.DataMiner.Net.Exceptions.DataMinerException: Run Subscript 'myParentScript' Failed: 0x80004005
at CManagedAutomation.RunWrapped(CManagedAutomation* , Int32 iCookie, IUnknown* pIAutomation, tagVARIANT* varParameters, tagVARIANT* pvarReturn, String scriptName)
at CManagedAutomation.Run(CManagedAutomation* , Int32 iCookie, Char* bstrScriptName, IUnknown* pIAutomation, tagVARIANT* varParameters, tagVARIANT* varEntryPoint, tagVARIANT* pvarReturn) (CSharp; 0x80131500h): (see comment for more details)
Script Failure (mySubScript): (Code: 0x80131500) Skyline.DataMiner.Net.Exceptions.DataMinerException: Get Memory Position 'subscriptMemory':1 Failed: 0x80004005
at CManagedAutomation.RunWrapped(CManagedAutomation* , Int32 iCookie, IUnknown* pIAutomation, tagVARIANT* varParameters, tagVARIANT* pvarReturn, String scriptName)
at CManagedAutomation.Run(CManagedAutomation* , Int32 iCookie, Char* bstrScriptName, IUnknown* pIAutomation, tagVARIANT* varParameters, tagVARIANT* varEntryPoint, tagVARIANT* pvarReturn) (CSharp; 0x80131500h): (see comment for more details)

Class SubScriptOptions | DataMiner Docs

Class SubScriptOptions
SelectMemory(String, ScriptMemory)

Selects a script memory from the main script to be used as the script memory in the subscript.

Examples
Main script:

<code class="hljs stata"><span class="hljs-keyword">var</span> <span class="hljs-keyword">memory</span> = engine.GetMemory(<span class="hljs-string">"parentMemory"</span>);	<span class="hljs-comment">// The parent script has a script memory with name "parentMemory".</span>
<span class="hljs-keyword">memory</span>.<span class="hljs-keyword">Set</span>(1, <span class="hljs-string">"MyValue"</span>);	<span class="hljs-comment">// The first entry of this memory is set to the value "MyValue".</span></code>

var subscript = engine.PrepareSubScript("MySubscript");

<code class="hljs stata">
</code>

<span class="hljs-selector-tag">subscript</span><span class="hljs-selector-class">.SelectMemory</span>(<span class="hljs-string">"subscriptMemory"</span>, memory); <span class="hljs-comment">// The subscript has a script memory with name "subscriptMemory" and this memory will be linked to the parent memory.</span>
<span class="hljs-selector-tag">subscript</span><span class="hljs-selector-class">.StartScript</span>();

Sub-script:

<code class="hljs stata"><span class="hljs-keyword">var</span> <span class="hljs-keyword">memory</span> = engine.GetMemory(<span class="hljs-string">"subscriptMemory"</span>);
engine.GenerateInformation(Convert.<span class="hljs-keyword">ToString</span>(<span class="hljs-keyword">memory</span>.<span class="hljs-built_in">Get</span>(1))); <span class="hljs-comment">// This will generate an information event with value: "MyValue".</span></code>
Thomas Ghysbrecht [SLC] [DevOps Enabler] Answered question 21st April 2022

3 Answers

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Thibault Heylen [SLC] [DevOps Advocate]1.51K Posted 14th April 2022 1 Comment

Hi,

We did some internal testing and could indeed see there's an issue with this memory files in subscripts. A task was created to get this resolved.

As soon as this is resolved, an update will also be posted here.

Kind regards,

Thibault

Thibault Heylen [SLC] [DevOps Advocate] Posted new comment 20th April 2022
Thibault Heylen [SLC] [DevOps Advocate] commented 20th April 2022

task created: https://collaboration.dataminer.services/task/183310

1
Thomas Ghysbrecht [SLC] [DevOps Enabler]4.80K Posted 21st April 2022 1 Comment

Hi, That 'SubScriptOptions.SelectMemory(String, ScriptMemory)' method is unfortunately only compatible with persistent memory files. The underlying logic just calls the 'SubScriptOptions.SelectMemory(String, String)' method where the 'LinkedFile' property of the given 'ScriptMemory' is used for the second argument.  I have updated the documentation to reflect this.

Data Miner Posted new comment 24th April 2022
Data Miner commented 24th April 2022

Thank you Thomas.

0
Joey Vanhalst [SLC] [DevOps Advocate]1.80K Posted 14th April 2022 3 Comments

I got a similar exception and was only able to get it to work when selecting "Persistent" for the memory. In that case, it also stores the value to a file. More info available here.

What do you want to use memory for exactly? In case you are using C# in your scripts, then you can probably do what you want to achieve without using script memory.

Data Miner Posted new comment 20th April 2022
Data Miner commented 19th April 2022

I want to get a zero-user-prompt Parent script to pass values to a Subscript on-the-fly. Volatile memory sounds like a way to achieve this?

I will run more than one instances of the script-pair at the same time, so Persistent memory will not work. I’m hoping volatile memory will work?

Additionally, I manage to get a zero-user-prompt Parent script to launch a subscript to read some [fairly static, operator-changeable] values from Persistent memory. And then I tried but failed to launch a Sub-subscript [2nd level] with SelectMemory(myPersistentScriptMemoryObject) when the Sub-subscript is expecting volatile memory. You may say this is expected behaviour but according to documentation for ScriptMemory [https://docs.dataminer.services/develop/api/types/Skyline.DataMiner.Automation.ScriptMemory.html], persistent and volatile memories are of the same class; only difference is the LinkedFile property which is an empty string for volatile memory. So I expect SubScriptOptions.SelectMemory(String, ScriptMemory) to take the supplied ScriptMemory object, regardless if it’s persistent or volatile.

Joey Vanhalst [SLC] [DevOps Advocate] commented 20th April 2022

If you need to pass input from a parent script to a subscript, then you could use parameters instead. Either you create multiple parameters if you need to pass more than just 1 value, or you can use a serialized string (json for example) that you deserialize in your subscript that contains all info you need.

Data Miner commented 20th April 2022

Thanks Joey. Yes, script parameters definitely have their purpose and use cases and I do use them but can I here?

Here, I have human operators, who don’t need to know the auto-triggered, non-interactive, zero-prompts scripts but need to change some fairly static input values to the scripts, e.g. cost of a banana. I think the ‘Memory Files’ definition screen provides a good interface for the human operator.

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