Invalid OBJ file header version error report should report that the obj version is incorrect.

[wpostma]

If the following provided obj file which works fine in XPlane is actually invalid, a line number or some output of the content or context which was invalid would be useful.

stormwindow.obj attached (zip)

stormwindow.zip

UnrecoverableParseERror line 64, xplane_imp_parser.py.

if not lines or not (lines[0] in {"A", "I"} and lines[1:3] == ["800", "OBJ"]):
    logger.error(
        ".obj file must start with exactly the OBJ header. Check filetype and content"
    )
    raise UnrecoverableParserError

Wouldn't it be friendlier to raise the message instead of logging it? The logs do not show in the error report as you can see in the message. WOuld it not be better to raise InvalidHeaderError

Sometimes the files I am encountering have cr/lf quirks and have weird formatting like this

I

800

OBJ

TEXTURE miscobjects.png

POINT_COUNTS 385 0 0 960

VT -0.678609 0.351299 3.048667 -0.983369 -0.179792 -0.025709 0.275422 0.718949

VT -0.678740 0.348166 3.048664 -0.998706 0.043618 -0.026161 0.275422 0.718290

VT -0.675921 0.351276 2.946007 -0.985842 -0.164899 0.030391 0.260027 0.718944

[wpostma]

The obj attached to this issue is double spaced, but these double spaced items import into xplane just fine.
May I suggest you filter empty lines, like this:

def fixme(n1,n2):
out = []
afile = open(n1,"r")
ofile = open(n2,"w")
lines = afile.readlines()
print('read '+n1)
for line in lines:
line = line.strip(' ').strip('\n').strip('\r')
if line != '':
out.append(line)
return out