When designing queries in Dynamics NAV you’ll get an error i CSide if you include a BLOB field, but no error if you include a MediaSet field. At runtime, you’ll get this strange error:

Unable to compare operands of type NSMediaSetWrapper with NavMediaDescriptionCollection.

Remove your MediaSet field from the Query Object and everything works again.

Att Microsoft: Perhaps expand the BLOB check in FINSQL.EXE to include MediaSet fields also 🙂

Blog entry to serve as hit for googling this error

Grap ’em while there are hot 🙂

• Microsoft Dynamics NAV 2017 CU 3
• Microsoft Dynamics NAV 2016 CU 16
• Microsoft Dynamics NAV 2015 CU 28
• Microsoft Dynamics NAV 2013 R2 CU 40
• Microsoft Dynamics NAV 2013 CU 47

Also, important to notice, if you by any change installed the pulled NAV2016 CU15 or NAV2017 CU2 before they got pulled, please upgrade to either CU15.1/CU2.1 or better yet, this months release.

Finally, we also got CU15.1 for NAV2016

Get it here: https://www.microsoft.com/en-us/download/details.aspx?id=54682

Get the hot details here.