obj output not recognized by opencascade

Hello,

transforming ply into obj looks resulting n this:

v 0.61253494 0.64454913 1.6859013
v 0.6138656 0.6361233 1.6881652
v 0.6098581 0.6328063 1.6720066
v 0.6104483 0.6368164 1.6767569
v 0.6104662 0.6435574 1.6796639
....

But somehow is this obj format not recognizd by the oencascade app for android.

What am I doing wrong if I want to have an obj file?