https://forums.autodesk.com/t5/revit-api-forum/reverting-to-blank-parameter-value-possible-in-api/m-p/4962584#M77072 <P>A project or shared parameter of an element, when newly created, initially has no value even if it is a double or an integer. But once we set values to them, we are not able to return to their initial no value state. Especially for number parameters, we must set a value into them.</P><P>&nbsp;</P><P>This becomes an issue when they are shown in schedules. The parameter of a newly created element in the schedule gives a null value, which is better when we don't want to set anything there. But once it has a value and we want to set it to nothing again, it is impossible to re-initialize since Revit asks to insert a value from that time on.</P><P>&nbsp;</P><P>I am aware that this is an issue of Revit itself, but is this possible to set nothing to number parameters at least&nbsp;in the API?</P> Wed, 16 Apr 2014 02:31:45 GMT homer_anave 2014-04-16T02:31:45Z https://forums.autodesk.com/t5/revit-api-forum/reverting-to-blank-parameter-value-possible-in-api/m-p/4962584#M77072 <P>A project or shared parameter of an element, when newly created, initially has no value even if it is a double or an integer. But once we set values to them, we are not able to return to their initial no value state. Especially for number parameters, we must set a value into them.</P><P>&nbsp;</P><P>This becomes an issue when they are shown in schedules. The parameter of a newly created element in the schedule gives a null value, which is better when we don't want to set anything there. But once it has a value and we want to set it to nothing again, it is impossible to re-initialize since Revit asks to insert a value from that time on.</P><P>&nbsp;</P><P>I am aware that this is an issue of Revit itself, but is this possible to set nothing to number parameters at least&nbsp;in the API?</P> Wed, 16 Apr 2014 02:31:45 GMT https://forums.autodesk.com/t5/revit-api-forum/reverting-to-blank-parameter-value-possible-in-api/m-p/4962584#M77072 homer_anave 2014-04-16T02:31:45Z https://forums.autodesk.com/t5/revit-api-forum/reverting-to-blank-parameter-value-possible-in-api/m-p/4967760#M77073 <P>Hi,</P> <P>&nbsp;</P> <P>Unfortunately I don't believe this is possible, the Parameter.Set method aways expect a value...</P> <P>&nbsp;</P> Thu, 17 Apr 2014 14:29:22 GMT https://forums.autodesk.com/t5/revit-api-forum/reverting-to-blank-parameter-value-possible-in-api/m-p/4967760#M77073 augusto.goncalves 2014-04-17T14:29:22Z