Error in Lazarus

Error reading TMSFNCNavigationPanel1.OldWidth:
Invalid value for property


Can you open the form from the IDE, ignore this property error, save the form file and recompile your app?

No. Each new application with TMSFNCNavigationPanel has the same.

Lazarus 1.8.4-Win32.


The stop is here:  

1087: Filer.DefineProperty('OldWidth', @ReadOldWidth, @WriteOldWidth, True);   
In lpm:
OldWidth = 0s


We have identified this issue and have applied a fix. The next version will address this.