It sounds like you're experiencing an issue with the Blockly interface in ARC, specifically with the controlCommand block not displaying its dropdown menu correctly. This issue might be related to a recent update, which could have introduced a change or a bug affecting this functionality.

Here are a few steps you can take to troubleshoot and potentially resolve the issue:

1. Check for Updates: Ensure that ARC is up to date. Synthiam frequently releases updates that fix bugs and improve functionality. If there's an update available, install it and check if the issue persists.

2. Clear Cache: Sometimes, the local cache can cause issues with software behavior. Try clearing ARC's cache from the settings or options menu, then restart ARC and see if the issue is resolved.

3. Re-add the Blockly Skill: Try removing the Blockly skill from your project and then adding it back again. This can sometimes reset the skill's settings and resolve unexpected behavior.

4. Use an Alternative Method: While this doesn't solve the Blockly issue directly, you can use the Script skill to manually write the controlCommand you need as a workaround. This requires using EZ-Script or another supported scripting language in ARC. For example, to call a command on another skill, you would use:

   ControlCommand("Skill Name", "Command", "Optional Parameters")
   

   Replace "Skill Name", "Command", and "Optional Parameters" with the appropriate values for your project.

5. Check the ARC Forum and Support: Look for similar issues reported by other users on the Synthiam forum or support section. It's possible that others have encountered the same problem and found a solution or workaround.

6. Report the Issue: If none of the above steps resolve the issue, consider reporting it to Synthiam's support team. Provide as much detail as possible, including the version of ARC you're using, the specific steps that lead to the issue, and any error messages you receive. Synthiam's support team or community members might be able to offer a solution or provide further troubleshooting steps.

Remember, while encountering issues can be frustrating, detailed reports and feedback from users like you help software developers identify and fix problems, leading to a better product for everyone.

What robot skills do you have in your project and what are their window names Screenshot your actual project.

I'm guessing one of the names of yoru robot skills has a ' single quote or a " double quote in it, or maybe a coma. or some character that isn't alpha numeric so maybe it's not parsing correctly. it's silly the way Blockly works but that's how they made it. so some characters that are not A-Z or 0-1 break the thing.

Yes I must have made some type of improper scenario that could be pulled up by control command. Will have to backtrack and find it. I tried a new project, pulled up Blockly and it doesn't have this problem so it is what you have described. Part of the problem is it doesn't even open up and have a pull down menu so it's hard to debug it.

Hmm that’s a lot but shouldn’t be a limit. Is there an error in the debug window?