KB-1428 File Upload expression evaluation error within Interface Designer

Parmida Borhani — Mon, 23 Jul 2018 03:35:12 GMT

Current Revision posted to Appian Knowledge Base by Parmida Borhani on 7/23/2018 3:35:12 AM

Symptoms

Within the Interface Designer, when uploading a document to a File Upload field and selecting "Submit", the following error is displayed:

Could not display interface. Please check definition and inputs.
Interface Definition: Expression evaluation error at function a!fileUploadField [line X]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function fn!content_appian_internal [line X]: Invalid Content ID

However, when navigating to the document folder, users see that the document uploaded correctly.

Cause

Files are moved from a temporary directory on upload to the final destination on submit. Once the file is moved to its destination, it gets a new ID and the ID associated with the file in the temporary directory is deleted. This error is expected in the Interface Designer because the new ID is unknown to the Interface Designer.

Action

This is not a bug and is expected behavior for the Interface Designer. This is not an issue in Appian 17.4 because the behavior was changed to keep the file ID the same.

Affected Versions

This article applies to Appian 17.3 and below.

Last Reviewed: November 2017

Tags: known issues, interfaces, SAIL, application design, fixed issues

KB-1428 File Upload expression evaluation error within Interface Designer

Parmida Borhani — Thu, 30 Nov 2017 21:54:01 GMT

Revision 6 posted to Appian Knowledge Base by Parmida Borhani on 11/30/2017 9:54:01 PM

Symptoms

Within the Interface Designer, when uploading a document to a File Upload field and selecting "Submit", the following error is displayed:

Could not display interface. Please check definition and inputs.
Interface Definition: Expression evaluation error at function a!fileUploadField [line X]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function fn!content_appian_internal [line X]: Invalid Content ID

However, when navigating to the document folder, users see that the document uploaded correctly.

Cause

Action

This is not a bug and is expected behavior for the Interface Designer. This is not an issue in Appian 17.4 because the behavior was changed to keep the file ID the same.

Affected Versions

This article applies to Appian 17.3 and below.

Last Reviewed: November 2017

Tags: known issues, interfaces, SAIL, fixed issues

KB-XXXX File Upload expression evaluation error within Interface Designer

Parmida Borhani — Thu, 30 Nov 2017 16:52:50 GMT

Revision 5 posted to Appian Knowledge Base by Parmida Borhani on 11/30/2017 4:52:50 PM

Symptoms

Within the Interface Designer, when uploading a document to a File Upload field and selecting "Submit", the following error is displayed:

Could not display interface. Please check definition and inputs.
Interface Definition: Expression evaluation error at function a!fileUploadField [line X]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function fn!content_appian_internal [line X]: Invalid Content ID

However, when navigating to the document folder, users see that the document uploaded correctly.

Cause

Action

This is not a bug and is expected behavior for the Interface Designer. This is not an issue in Appian 17.4 because the behavior was changed to keep the file ID the same.

Affected Versions

This article applies to Appian 17.3 and below.

Last Reviewed: November 2017

Tags: known issues, interfaces, SAIL, fixed issues

KB-XXXX File Upload expression evaluation error within Interface Designer

Parmida Borhani — Wed, 29 Nov 2017 02:57:02 GMT

Revision 1 posted to Appian Knowledge Base by Parmida Borhani on 11/29/2017 2:57:02 AM

Symptoms

Within the Interface Designer, when uploading a document to a File Upload field and selecting "Submit", the following error is displayed:

Could not display interface. Please check definition and inputs.

Interface Definition: Expression evaluation error at function a!fileUploadField [line X]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function fn!content_appian_internal [line X]: Invalid Content ID

However, when navigating to the document folder, users see that the document uploaded correctly.

Cause

This is an expected error in the Interface Designer. When a document is submitted, the ID changes upon submission and the previous ID gets deleted. In the Interface Designer, the user stays in the same location after submission, causing the error about the invalid ID.

Action

This is not an issue in Appian 17.4.

Affected Versions

This article applies to Appian 17.3 and below.

Last Reviewed: November 2017

KB-XXXX File Upload expression evaluation error within Interface Designer

Parmida Borhani — Tue, 28 Nov 2017 22:12:08 GMT

Revision 4 posted to Appian Knowledge Base by Parmida Borhani on 11/28/2017 10:12:08 PM

Symptoms

Within the Interface Designer, when uploading a document to a File Upload field and selecting "Submit", the following error is displayed:

Could not display interface. Please check definition and inputs.
Interface Definition: Expression evaluation error at function a!fileUploadField [line X]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function fn!content_appian_internal [line X]: Invalid Content ID

However, when navigating to the document folder, users see that the document uploaded correctly.

Cause

Action

This is not a bug and is expected behavior. This is not an issue in Appian 17.4 because the behavior was changed to keep the file ID the same.

Affected Versions

This article applies to Appian 17.3 and below.

Last Reviewed: November 2017

Tags: known issues, interfaces, SAIL, fixed issues

KB-XXXX File Upload expression evaluation error within Interface Designer

Parmida Borhani — Tue, 28 Nov 2017 22:09:03 GMT

Revision 3 posted to Appian Knowledge Base by Parmida Borhani on 11/28/2017 10:09:03 PM

Symptoms

Within the Interface Designer, when uploading a document to a File Upload field and selecting "Submit", the following error is displayed:

Could not display interface. Please check definition and inputs.
Interface Definition: Expression evaluation error at function a!fileUploadField [line X]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function fn!content_appian_internal [line X]: Invalid Content ID

However, when navigating to the document folder, users see that the document uploaded correctly.

Cause

Files are moved from a temporary directory on upload to the final destination on submit. Once the file is moved to its destination, it gets a new ID. This error is expected in the Interface Designer because the new ID is unknown to the Interface Designer.

Action

This is not a bug and is expected behavior. This is not an issue in Appian 17.4 because the behavior was changed to keep the file ID the same.

Affected Versions

This article applies to Appian 17.3 and below.

Last Reviewed: November 2017

KB-XXXX File Upload expression evaluation error within Interface Designer

Parmida Borhani — Tue, 28 Nov 2017 21:58:57 GMT

Revision 2 posted to Appian Knowledge Base by Parmida Borhani on 11/28/2017 9:58:57 PM

Symptoms

Within the Interface Designer, when uploading a document to a File Upload field and selecting "Submit", the following error is displayed:

Could not display interface. Please check definition and inputs.
Interface Definition: Expression evaluation error at function a!fileUploadField [line X]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function fn!content_appian_internal [line X]: Invalid Content ID

However, when navigating to the document folder, users see that the document uploaded correctly.

Cause

Action

This is not a bug and is expected behavior. This is not an issue in Appian 17.4 because in 17.4 and forward, the ID no longer changes upon submission.

Affected Versions

This article applies to Appian 17.3 and below.

Last Reviewed: November 2017