[NejcB]

Dear All,

I would like to use the the pyFoamSTLUtility.py to join several stl files in one file. However when I run the command "pyFoamSTLUtility.py cat file1.stl file2.stl" I receive an error message saying:

Error in /usr/local/bin/pyFoamSTLUtility.py : FatalError in PyFoam: 'PyFoam FATAL ERROR on line 478 of file /usr/local/lib/python2.7/dist-packages/PyFoam/Applications/PyFoamApplication.py: Specify either --to-stdout or --stld-file' in Application-class: STLUtility

To me it looks there is a problem with file streams but based on the error code I am not able to debug it. I was also thinking that there may be simply a syntax problem and that the syntax of my command is not right (e.g. some bracket missing etc.). Then since it may be stream related I tried to use it with binary and ascii stl formats but I get the same error message in both cases.

Does someone, who has already successfully been using this app tell me if you can see a mistake I am doing?

Thanks in advance,
Nejc

[alexeym]

Hi,

I am not a specialist in pyFoam but if you look at STLUtility.py:

...
        # Add option groups to parsers
        for cmd in [joinCmd,removeCmd,mergeCmd]:
            outOpts=OptionGroup(cmd.parser,
                                "Write Options",
                                "Where the resulting STL is written to")
            outOpts.add_option("--to-stdout",
                               action="store_true",
                               dest="stdout",
                               default=False,
                               help="Instead of writing to file write to stdout (used for piping into other commands)")
            outOpts.add_option("--force-write",
                               action="store_true",
                               dest="forceWrite",
                               default=False,
                               help="Force writing if the file already exists")
            outOpts.add_option("--stl-file",
                               action="store",
                               dest="stlFile",
                               default=None,
                               help="Write to this filename")
            cmd.parser.add_option_group(outOpts)
...

So the error you get is due to missing output option. Utility does not know where to write resulting file.

[opedrofunk]

For a quick fix, you might also just append one (or more) stl files to one another:

cat file*.stl > combined.stl

Hope that helps!
Peter

[NejcB]

Thank you, indeed the > fileOut.stl syntax is needed for successful operation.

The problem is solved.

[NejcB]

Dear All, I was a bit too quick while replying for the first time because I only noticed that there had been no more error thrown in the terminal and that a new file got created if you use "> fileOut.stl" but when I opened the file I found out that it's just the error message that gets flushed to that new file.

Then I experimented a bit and I found out that the following code works well:

pyFoamSTLUtility.py join fileIn1.stl fileIn2.stl fileIn3.stl ... --stl-file fileOut.stl

Where fileOut.stl is the merged stl.

The utility works on ascii stl file but not on the binary version of files.

Best regards,
Nejc