Hello and thanks for the reply.

My input file came from my checking SHELX manuals and SHELX instructions on the web, and trying to modify them to suit my case.

I tried olex2 on a Windows computer (somehow olex2 did not run on my Linux box, and only v1.3 was able to install on that Windows machine and not the latest v1.5). However, olex2 (the installation program) does not come with Shelx program executables, and I could not locate the installers for the shelx software on Windows.

Hence I am running SHELXL in line command mode on my Linux box.

Thank you again,

Fred.

On 12/03/2024 10:12, David Waterman wrote:
Hi Fred,

I find Olex2 and shelxle are both convenient interfaces to SHELXL refinement, that take care of some of the details of .ins file format for you. However, maybe you are stuck in the starting gate, depending on what is malformed in your input file. Where did your input files come from?

Cheers
-- David


On Tue, 12 Mar 2024 at 09:01, Fred Vellieux <[email protected]> wrote:

    Hi folks,

    I have a simple question: is there an electronic bulletin board for
    small-molecule crystallography? I have checked the list of CCP
    projects
    and there is no CCP-project for small molecule crystallography in
    the list.

    I am trying to run SHELXL, and it fails with the cryptic message
    "** BAD
    ATOM OR UNKNOWN INSTRUCTION **".

    The alternative for me would be of course to use software meant for
    macromolecular cystallography (that I know) on small molecule
    diffraction data. And using the small molecule coordinate files
    transformed to a suitable format. I don't know if this is feasible or
    even advised. Probably not.

    Thanks,

    Fred.

-- MedChem, 1st F. Medicine, Charles University
    BIOCEV, Vestec, Czech Republic

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