A family of Microsoft relational database management systems designed for ease of use.
Lewis Collier,
The Resource Names field is a text based field and like all other text based fields in Project, it is limited to 255 characters when attempting a copy/paste. Also, bear in mind that if resources are assigned at less than full time (i.e. 100%), the assignment level (e.g. [50%]) becomes part of the string count for each resource name.
Here are a couple of options. Instead of trying to copy/paste all the resources from one task to another, use the Assign Resources window for the new task. That is better practice anyway.
The other option is to shorten the resource names so that when combined, the total number of characters is less than 255 characters.
Well actually, there is one other way, use VBA to copy the names.
Hope this helps.
John