@Matteo-1 Great! Thank you very much for informing! I am glad it solved the issue.

Hi everybody, all my problems with arrows are solved. Thanks very much for your help.

Dear @Mariangela , To find and show hydrogen bonds you can use the Hydrogen Bond Finder Extension. It allows you to find all H-bonds in the selected system or between two systems, for example, between a receptor and a ligand. To find/show H-bonds between a receptor and a ligand, perform the following steps (see the gif at the end): in the Hydrogen Bond Finder Extension click on "...in the current selection and the system"; select the receptor in the Document view and in the Hydrogen Bond Finder click Set; [image: 0_1607705913844_07ee1a78-6dba-4dcc-912b-bf40a6d8a6fa-image.png] set the Settings of the Hydrogen Bond Finder if necessary; now, select only the ligand in the Document view and in the Hydrogen Bond Finder click Add hydrogen bond visual model Now you should have a new visual model in the Document view. If you select it, you can modify its options in the Inspector. See an example below: [image: alt text]

@dmitriymarin @admin It actually was this. Thanks for solving the problem!

@emmanuel Ok, maybe the "Get the SDK" button is not clear. How to download SAMSON SDK is explained at the end of the page you mention first : https://documentation.samson-connect.net/developers/latest/page_installation.html#SDKInstallationStepsDownloadingSDK Sorry for the issue. Jocelyn

Great! You can check the tutorial on building a SAMSON Element on Linux. Feel free to ask questions if you experience any problems! Best, Dmitriy Marin

Done ;-). setLockedFlag(bool) and getLockedFlag() inside SBGWindow.

Hi Petr, thanks for the suggestion. We are thinking we might actually go the opposite route, i.e. hide these elements from My SAMSON / My Elements, so that they cannot be removed.

ok great!

@Federico-Maria , Great! Thanks for checking! Thanks for mentioning, the thing in 'About SAMSON' will be fixed with the next patch release of SAMSON.

Currently, it is not possible because the selection filter functionality is not exposed to external elements. We will update it in the upcoming release of SAMSON.

Yes, I could already run it. Thank you!

Ok thanks! We'll see how we could do that!

I thought I did but you're right now it's fine. Thanks!

wonderful! Thanks

Hi @Nicolo-0 , No, currently, there is no option to specify that H-bonds in an H-bond group (which is part of a structural model) should be displayed between hydrogens and acceptors - they are drawn between donors and acceptors, since hydrogens might be implicit. However, we can add such an option in the next major release of SAMSON. But if you want it just for the sake of visualization, then you can try setting hydrogens as donors programatically (via Python). Note that this should be done without calling update() since this will recompute the bonds.

Hello, Thanks for your interest in SAMSON! If you’re on Windows, you will need to install the latest runtime from Microsoft. They are available here: https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads. You should install vc_redist.x64.exe available from that page. Best regards, Stephane

@Stephane-Redon, it's done :) Thanks. Here's what I did: SEFleXibleVisualModel* model = new SEFleXibleVisualModel(vp_file, "vp"); // my visual model model->setName("VP_Arrows"); SAMSON::beginHolding("Display vp by arrows"); SAMSON::hold(model); model->create(); SAMSON::getActiveLayer()->addChild(model); // stop holding changes to the document SAMSON::endHolding();

there is RMSF and hydrogen bond

@Andrew-Rosen , If you have any other feature requests or suggestions, please, do not hesitate to contact us via this Forum (SAMSON > Feature requests), e-mail, or the Feedback form within SAMSON.