In general, the maximum number of characters that the Virtual DataPort accepts for naming the view is **100**. However, if you need to increase this value, then you could perform the following steps in the Virtual DataPort Administration Tool:
* Execute below command in VQL shell as
`set 'com.denodo.vdb.catalog.Catalog.identifiersMaxLength' = <'required character length'>`
* Restart the Virtual DataPort Server for changes to take place.
* Now you are able to rename a view upto the character length specified in the above step.
Alternatively, you could change the value of this property in the VDBConfiguration.properties file located under the directory <DENODO_HOME>\conf\vdp and run the regenerateFiles for the changes to be effective.
Hope this helps!