Please carefully read the documentation about what is supported:  https://docs.appeon.com/pb2019r2/application_techniques/ch20s01.html

String data type and array are supported, bit it cannot be Generic Nullable<T>.

I haven't received any responses for my importer question.  So I went on to try to create a "wrapper" to see if that would get me going.

I created the code below in snapdevelop and built with no issues.  When I try to import that DLL into PowerBuilder, I still get a failed item on the method because of the return value.  With the hint at the top saying to create a wrapper to correct.  So, guessing I did not create my wrapper correctly.  I am trying to return an string array.  Is this just not possible with the DLL Importer and PowerBuilder?

Any help would be greatly appreciated.

Rick

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using dtSearch.Engine;

namespace Searchtest 
{

    public class Test
    {
        public List<string> RunSearchAndGetMatchingFilenames(string indexPath, string request)
        {
            List<string> allResults = new List<string>();

            SearchJob sj = new SearchJob();
            sj.IndexesToSearch.Add(indexPath);
            sj.Request = request;
            sj.Execute();

            SearchResults sr = sj.Results;
            for (int i = 0; i < sr.Count; i++)
            {
                sr.GetNthDoc(i);
                allResults.Add(sr.CurrentItem.Filename);
            }

            return allResults;
        }


    }

}