Known Issues

The known issues apply to the current release (Version 1.4.3) of the software, and show workarounds where applicable. There is also a list of Defects Fixed for this and previous releases.

Critical Issues

Using ad-hoc distributions in Sensitivity simulations may cause the software to crash while making changes in the Sensitivity Specs Panel. To work with ad-hoc distributions you can use version 1.4.1. The sensitivity simulations themselves will work correctly, it is only using the Panel that is an issue.

Other Issues

• If you uncheck the maintain aspect ratio on the Graphics Properties for a graphics box the image may appear blurry on some browsers (notably Chrome).
• When you are building a model every time a change is made, or data are imported, the model will be reinitialized so that you can hover over variables to see their values. To give usable results on the interface, however, changes made via controls do not trigger a reinitialization. Otherwise, for example, changing price might immediately change market share, which does not make sense, especially in a multiplayer game. A consequence of this, however, is that on the model layer hovering over a controlled value will display the value last used, not the controlled value. Similarly on the interface, values will be the last used value, not the updated control value (other input controls will update to the controlled value).
• Using the new dropdown page selector to move between multiple graphs or tables may not work in full screen presentation mode on a second monitor. It does work when published and in windowed presentation mode.
• Some of the random and discrete builtins generate very tiny differences on Windows and Macintosh computers (and on published simulations). Normally these are not noticeable, but if they are amplified by the model equations (through positive feedback) results may be measurably different.
• Comparative graph thicknesses set by graph in version 1.2 or earlier will be ignored. Line colors, patterns and widths for comparative graphs are set in the Graph Styles Properties Panel, and there is an override to set thickness for individual graphs.
• There is a precision limit on the knob on the interface of 0.01.
• Models saved in 1.4.3 not using features new to 1.4.3 are compatible with version 1.1 and later, with some exceptions. First, if opened in 1.1.x, the results will not be available, because the isdb format has been updated, so any graphs or tables will start empty. Second, some name positions may be incorrect when a model is open in 1.1.x. The positions will be correct if the model is reopened in the current version (whether adjusted in 1.1.x or not).
• Comparative graphs and tables that have had specific runs selected for display will behave differently than in version 1.1 (see Graph Properties Panel for more details).
• After typing into a text box, you may need to click twice on checkboxes on the panel (such as Transparent background) in order to change their state.
• When replacing a model using the Interface menu, any Model Views that have tables, graphs, graphics frames, or numeric displays visible will lose the visibility of those elements. It will work better to keep such objects on a template.
• Simulation Events (previously called Posters and Messages) translated from 10.1 that include navigation to interface locations will need to be redone. All simulation event actions will be applied to the model, so you may need to move them to the interface, depending on their purpose.
• Interfaces from 10.1 will come across, but will need to be adjusted. See Using Version 10 Models.
• Opening models from iThink or STELLA versions prior to 10.0.4 may lose interface information (especially stories). For such models, it will work better to open them in STELLA Version 10.1.2, and then open them in the new Stella and iThink products.