@Django I know why I cannot access InnerMessages.  The actual exception thrown is an Acumatica exception, not a System.Exception.  In my printscreen above, I noticed it had some Acumatica lingo in it so I did this test to see what the exception type is.

When I try to get the info for the exception, in my code, “e.” intellisense only brings up the System.Exception information.  Do I need to “cast” the exception to a PX exception somehow?  

This is more of a C# issue.  I’m a VB developer by trade, so I’m not very sharp with c#.

I think I am on my way to getting this.

This code works for me.  I’m going to make a class so I can reuse this in other places.

            catch (Exception e)
            {
                if(e.GetType().FullName == "PX.Data.PXOuterException")
                {
                    StringBuilder sb = new StringBuilder();
                    PXOuterException pX = (PXOuterException)e;

                    sb.Append(e.Message + Environment.NewLine);
                    foreach (string item in pX.InnerMessages)
                    {
                        sb.Append(item + Environment.NewLine);
                    }

                    PXTrace.WriteError(sb.ToString());
                }
                ex = e;
            }
Isn’t it pretty!

I’m thinking that the answers on this SO question should be able to help

https://stackoverflow.com/a/35084416/9542263

It looks like

e.InnerMessages.ToString() would give you something to work with.