Encoder failing to output h264

Hello I 've read all the threads and have not found a solution. I have applied all the suggested solutions, restart, using other codecs etc..
I am trying to create an h264 movie from a png sequence. The sequence is fine. It runs perfectly in AE. No corrupt files. I am running windows 10, dual 1080 gtx cards and intel proc

Here is the error message:

- Encoding Time: 00:20:50

12/05/2017 05:21:46 PM : Encoding Failed

------------------------------------------------------------

Export Error

Error compiling movie.

Import Error

Importer returned bad result.

Writing with exporter: H.264

Writing to file: \\?\F:\IFilename_H264.mp4

Writing file type: H264

Around timecode: 00:02:30:37 - 00:02:31:00

Reading with importer: ImporterPNG

Reading from file: F:\filename.09032.png

Reading file type: PNG

Rendering at offset: 150.533 seconds

Component: ImporterPNG of type Importer

Selector: 47

Error code: 22