Get Exception Codes from Journal file using Revit API 2021

[n_mulconray]

I want to use this hit and miss method to find out why a Revit model crashes.

AFAIK, I would have to search the journal for the keywords ExceptionCode=?????

//here is an example of the code I would use is this the best method or can I get the exception and its code more directly using the revit api...

string journalPath = doc.Application.RecordingJournalFilename;
List<string> JournalLines = new List<string>();

var fs = new FileStream(journalPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
using (var sr = new StreamReader(fs))
{
string line;
while ((line = sr.ReadLine()) != null)
{
if (line.Contains("ExceptionCode=")

{

//record data after "ExceptionCode="

}

Also are the exception codes found in the journal file available from Autodesk on a site, otherwise i will just google each time i encounter a new error?

[jeremy_tammik · Accepted solution]

Dear Nik,

Yes, that would work as you describe, afaict. I am not aware of any official list of the possible exception codes that may appear in the journal files. If you have a large collection of historical journal files available, you could simply search the globally for all exception codes that you have ever encountered, e.g., like this:

grep "ExceptionCode" journal*.txt | sort | uniq

All exceptions that can be thrown by the Revit API are listed in the Autodesk.Revit.Exceptions namespace.

[n_mulconray]

If you don't have an IXian console in PowerShell you can use...

Select-String -Path "C:\Users\$Env:Username\AppData\Local\Autodesk\Revit\Autodesk Revit 2021\Journals\*.txt" -Pattern 'ExceptionCode=' |
Select-Object -ExpandProperty Line |
Sort-Object -Unique |
Out-File C:\Temp\ExceptionCodes.txt

though i have only tested with "Error:" in the journal file.