If after you start processing your simulation, you get a Rocky message saying you have "No Solver license available" (see Figure 1 below), but your license Status says OK (see also Verify Your Rocky License Status), then there might be a hidden Rocky process running in the background that is using your license. Even restarting Rocky might not clear all hidden processes in some cases.

To solve this issue, try restarting your computer. This should clear the hidden processes making use of your license.

Figure 8.35: Simulator message

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If attempting the above does not solve the problem, Submit a Support Request for additional assistance.

If when you Verify Your Rocky License Status, you see a message that indicates an issue with your license, Submit a Support Request for additional assistance.

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With a few exceptions (see also I cannot enter an input variable or mathematical function into a text field), most Rocky fields enable you to enter variables and/or mathematical functions instead of direct, numerical values. When you save a project with variables or functions for restart purposes, all but a few of these fields will retain the link between the value shown and the parametric expression that was entered.

The few Rocky fields that will not retain this link after being saved for restart include:

This means that in the project copy you have saved for restart, instead of being defined by the parametric expression you have entered, these few fields will instead be defined only by the resulting value adjusted due to restart. For example, if the resulting value was 5 seconds and the restart project was created at time 2 seconds on the original project, the new value in the unlinked field will be 3 seconds.

When you initially save the project copy, Rocky will remind you about which fields this affects via a "Links removed" message similar to the one in Figure 1.

Figure 8.36: Example Links removed message

If the field is enabled in the project copy, you may use the resulting field values as is or you may replace them with new parametric variables.

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Most users of Rocky will have single-instance licenses, which means that only one instance of the Rocky solver can be running at any one time. For these users, it is possible to use the Rocky Scheduler program to run multiple simulations in series, or one-by-one, but not in parallel or simultaneously.

If you have a single-instance license and attempt to start processing more than one simulation at a time, you will get a "No Solver license available" message for all but the first simulation, as it will be using the single license that was available. Once that first simulation is done processing, the license will be freed up to be used by the next simulation in the queue, and so on.

If you have a need to process multiple simulations simultaneously, please Submit a Support Request or contact your Rocky representative to ask about upgrading to an unnumbered Rocky license.

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Rocky automatically "locks" a project file to the instance of Rocky that has opened it, which helps prevent yourself and other users on your network from accidentally opening up a duplicate instance of the project and making changes that cannot be reconciled with the original project file. Rocky does this by adding a .lock file to the project directory when a project is opened. This lock file contains information about which system and Rocky instance is allowed to edit and save the active project. When the project is closed, Rocky automatically removes the lock file.

If you attempt to open a Rocky project file and are told by Rocky that it is locked via a message similar to the one in Figure 1, then it is likely that you or another user in your network has that project open already.

Figure 8.37: Example message you might see if you try opening a project that has been locked

You may still open a locked project if you wish by clicking OK on the message, but know that this is a "read-only" copy: any changes you make to the settings will not be savable as long as the project remains locked. If you do attempt to save the changes to this project while it is still locked, you may get a slightly different message from Rocky reminding you about its current status (Figure 2).

Figure 8.38: Example message you might see if you try saving a project that has been locked

In order to open a fully editable version of the project yourself, the other instance of the project file must first be closed.

There are some circumstances under which the .lock file might still be present for a project when it should have been removed. For example when the project has closed incorrectly, such as during a power outage or a forceful system reboot. In those cases, the process identifier used by Rocky to lock the file might have been assigned to another process, which might cause the program to believe Rocky is still being used when it isn't.

In these cases, if you are certain no one else is working on the file, you should manually delete the .lock file from the directory.

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If you are experiencing unexplained problems in the Rocky product—such as no content in the Offline User Manual, frequent shutdowns, or repeated errors for seemingly no reason—and those issues do not go away even after you uninstall and reinstall Rocky, then you might require a clean install.

Rocky uses several folders on your machine to store the files it needs. (See also the Common Folder Locations Used in Rocky section of the File Types and Folders topic.) Sometimes, those files can become corrupted, causing problems within the Rocky product itself.

Because these files can persist on your machine even after you uninstall and reinstall Rocky, there may be times when you need to fully clear these files prior to a reinstall.