TypeError: undefined is not iterable in 19.1.25.521

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Last Updated: 10 Jun 2025 15:27 by ADMIN

Christos

Created on: 10 Jun 2025 09:58

Type: Bug Report

TypeError: undefined is not iterable in 19.1.25.521

In version 19.1.25.521, I am updating the report source of the viewer immediately after calling $("#reportViewer1").telerik_ReportViewer. This now results in an error:

TypeError: undefined is not iterable (cannot read property Symbol(Symbol.iterator))

In previous versions, it used to work.

1 comment

ADMIN

Petar

Posted on: 10 Jun 2025 15:27

Hello,

Just in case someone encounters this issue and is unsure how to resolve it, as a potential workaround, please check the following forum thread: telerikReportViewer exception when preview a report item

Additionally, I made a knowledge base article out of it that may be helpful: TypeError undefined is not iterable in Telerik ReportViewer

Regards,
Petar
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