77606 - no subject - Hi,\n\nI want to use 'nColumnTable' func

By report, I am assuming Appian Reports, correct? If so, you cannot use nTableColumn expression in Appian reports. What are you trying to achieve by doing this? Are you trying to display an array of value in a process instance as one row each? Keep in mind, Appian reports work on the concept of 'one row' per instance. If your instance contains a pv! of type multiple, it will not be automatically rendered as multiple rows.
If this is a small set of data associated with the process instance, my recommendation would be to show it using ntablecolumns in the process dashboard using We content with dynamic data channel.
An ideal approach for your problem is to use the SAIL report framework and Grid component.

By report, I am assuming Appian Reports, correct? If so, you cannot use nTableColumn expression in Appian reports. What are you trying to achieve by doing this? Are you trying to display an array of value in a process instance as one row each? Keep in mind, Appian reports work on the concept of 'one row' per instance. If your instance contains a pv! of type multiple, it will not be automatically rendered as multiple rows.
If this is a small set of data associated with the process instance, my recommendation would be to show it using ntablecolumns in the process dashboard using We content with dynamic data channel.
An ideal approach for your problem is to use the SAIL report framework and Grid component.