Message: This is not a valid measurment

Reference Number: KB-01141
Last Modified: July 19, 2021

The information in this article applies to:

Chief Architect Premier or Chief Architect InteriorsHome Designer Professional or Home Designer Architectural or Home Designer Suite


When I try to move a selected object by clicking on a dimension line, a Warning message sometimes tells me:

"This is not a valid measurement. The object will not be moved."

What does this mean?


To move a selected object using a dimension, click on a dimension line and then type a new value into the inline dimension text editor. Only three types of characters are allowed:

  • Numerals
  • Decimal mark
  • Length or distance unit indicators (for example, ', ft, mm, or m)

If you type a character that does not fall into one of these categories, the Warning message will display. Click OK to close the message box, then click on the object and try again.

In Home Designer Pro, Chief Architect Interiors, and Chief Architect Premier, a complete list of unit indicators available for use can be found on the Unit Conversions panel of the Preferences dialog.

If you choose to use a unit indicator, it should be added after the numerals. If you do not use a unit indicator, inches will be used in Imperial files and millimeters will be used in metric files.

Here are some characters to avoid:

  • Thousands separator
  • Grave accent ` character instead of the apostrophe ' character for feet
  • Two apostrophes ' instead of a single quotation mark "
  • Complete words instead of unit indicator abbreviations or characters