Invoke Node - Revision history

Q: Added VI Scripting Category to page

2020-05-08T01:12:04Z

Added VI Scripting Category to page

← Older revision		Revision as of 01:12, 8 May 2020
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	[[Category:Application control]]		[[Category:Application control]]
	~~[[Category:VI Scripting]]~~
	[[Category:VI Server]]		[[Category:VI Server]]

Bryan at 12:22, 10 January 2019

2019-01-10T12:22:20Z

← Older revision		Revision as of 12:22, 10 January 2019
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	If you are unable to resolve that error message, you may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).		If you are unable to resolve that error message, you may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).

	[[~~category~~:~~application~~ control]]		[[Category:Application control]]
			[[Category:VI Scripting]]
			[[Category:VI Server]]

Michael_Aivaliotis at 10:05, 8 October 2007

2007-10-08T10:05:56Z

← Older revision		Revision as of 10:05, 8 October 2007
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	If you are unable to resolve that error message, you may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).		If you are unable to resolve that error message, you may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).

			[[category:application control]]

Michael_Aivaliotis at 08:51, 1 October 2007

2007-10-01T08:51:51Z

← Older revision		Revision as of 08:51, 1 October 2007
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	If you are unable to resolve that error message, you may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).		If you are unable to resolve that error message, you may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).

	~~[[Category:Uncategorized]]~~

Lui at 13:38, 13 June 2007

2007-06-13T13:38:06Z

← Older revision		Revision as of 13:38, 13 June 2007
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			The '''Invoke Node''' is used to perform a method on a VI using [[VI Server]], very similar to the [[Call By Reference]] Node. '''Invoke Node''', however, does not need a strictly typed reference and as such is not bound to the VI's connector pane and is free to call '''any VI'''. On the other hand, as the connector pane of the callee is unknown at editing time, one must use several calls to '''Invoke Node''' in order to set control values, run the VI and retrieve its results.<br /><br />
			When using the '''Invoke Node''' it is very common to stumble upon an error:
	== VI is not in appropriate state for the invoke node ==		== VI is not in appropriate state for the invoke node ==
	This is known ~~error~~, but I wouldn't call it ~~a problem~~. It's just how LabVIEW works. A lot of the methods for a VI reference can not be executed for VIs which are either in a reserved state or already running. When a VI is running is rather obvious but a reserved state means that the VI is either part of a running hierarchy of VIs (usually your application) or a strict typedefed VI reference is open to it. The reasons for this are not so simple but it comes down to protecting the VI from influences from different caller types. The Run ~~function~~ (amongst others) is asynchronous as it starts the VI but not necessarily waits for termination of the VI. An implicit reference to the VI as an icon in your block diagram or an explicit one in the form of a strict typedef to be used with the Call by Reference Node are synchronous as far as the caller is concerned.		This is a known behaviour, but I wouldn't call it an error. It's just how LabVIEW works. A lot of the methods for a VI reference can not be executed for VIs which are either in a reserved state or already running. When a VI is running is rather obvious but a reserved state means that the VI is either part of a running hierarchy of VIs (usually your application) or a strict typedefed VI reference is open to it. The reasons for this are not so simple but it comes down to protecting the VI from influences from different caller types. The Run method of the '''Invoke Node''' (amongst others) is asynchronous as it starts the VI but not necessarily waits for termination of the VI. An implicit reference to the VI as an icon in your block diagram or an explicit one in the form of a strict typedef to be used with the Call by Reference Node are synchronous as far as the caller is concerned.

	~~You~~ may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).		If you are unable to resolve that error message, you may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).

	[[Category:Uncategorized]]		[[Category:Uncategorized]]

MichaelAivaliotis at 10:04, 3 April 2007

2007-04-03T10:04:34Z

← Older revision		Revision as of 10:04, 3 April 2007
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	== VI is not in appropriate state for the invoke node ==		== VI is not in appropriate state for the invoke node ==
	This is known error, but I wouldn't call it a problem. It's just how LabVIEW works. A lot of the methods for a VI reference can not be executed for VIs which are either in a reserved state or already running. When a VI is running is rather obvious but a reserved state means that the VI is either part of a running hierarchy of VIs (usually your application) or a strict typedefed VI reference is open to it. The reasons for this are not so simple but it comes down to protecting the VI from influences from different caller types. The Run function (amongst others) is asynchronous as it starts the VI but not necessarily waits for termination of the VI. An implicit reference to the VI as an icon in your block diagram or an explicit one in the form of a strict typedef to be used with the Call by Reference Node are synchronous as far as the caller is concerned.		This is known error, but I wouldn't call it a problem. It's just how LabVIEW works. A lot of the methods for a VI reference can not be executed for VIs which are either in a reserved state or already running. When a VI is running is rather obvious but a reserved state means that the VI is either part of a running hierarchy of VIs (usually your application) or a strict typedefed VI reference is open to it. The reasons for this are not so simple but it comes down to protecting the VI from influences from different caller types. The Run function (amongst others) is asynchronous as it starts the VI but not necessarily waits for termination of the VI. An implicit reference to the VI as an icon in your block diagram or an explicit one in the form of a strict typedef to be used with the Call by Reference Node are synchronous as far as the caller is concerned.

	You may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).		You may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).

			[[Category:Uncategorized]]

MichaelAivaliotis: New page: == VI is not in appropriate state for the invoke node == This is known error, but I wouldn't call it a problem. It's just how LabVIEW works. A lot of the methods for a VI reference can no...

2007-03-18T05:04:59Z

New page: == VI is not in appropriate state for the invoke node == This is known error, but I wouldn't call it a problem. It's just how LabVIEW works. A lot of the methods for a VI reference can no...

New page

== VI is not in appropriate state for the invoke node ==
This is known error, but I wouldn't call it a problem. It's just how LabVIEW works. A lot of the methods for a VI reference can not be executed for VIs which are either in a reserved state or already running. When a VI is running is rather obvious but a reserved state means that the VI is either part of a running hierarchy of VIs (usually your application) or a strict typedefed VI reference is open to it. The reasons for this are not so simple but it comes down to protecting the VI from influences from different caller types. The Run function (amongst others) is asynchronous as it starts the VI but not necessarily waits for termination of the VI. An implicit reference to the VI as an icon in your block diagram or an explicit one in the form of a strict typedef to be used with the Call by Reference Node are synchronous as far as the caller is concerned.

You may eventually try to use the Call by Reference Node instead. If you need for whatever reasons to use the Run method you MUST make sure that the VI is not an explicit part of your application by not adding its icon anywhere in your app (and not opening a strict typedefed reference to it either).