Title: data expression contains illegal characters
Last modified: August 21, 2016

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# data expression contains illegal characters

 *  [myspoon](https://wordpress.org/support/users/myspoon/)
 * (@myspoon)
 * [12 years, 6 months ago](https://wordpress.org/support/topic/data-expression-contains-illegal-characters/)
 * Hi,
 * I’m trying to publish non standard rss fields and I get the error “data expression
   contains illegal characters”.
 * I believe it’s because the feed I’m using contains a question mark e.g /GenerateFeed.
   aspx?feedCode=012345678
 * Is that a problem? If so is there a workaround?
 * Many thanks, the plugin seems perfect if I can overcome this.
 * [http://wordpress.org/plugins/hungryfeed/](http://wordpress.org/plugins/hungryfeed/)

The topic ‘data expression contains illegal characters’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [myspoon](https://wordpress.org/support/users/myspoon/)
 * Last activity: [12 years, 6 months ago](https://wordpress.org/support/topic/data-expression-contains-illegal-characters/)
 * Status: not resolved