In rare situations, 5.00 chose the less likely model, which would be obvious if you looked at the two probabilities. It also states which one is most likely to be correct (and graphs that one). Prism reports the likelihood that each model is correct, and 5.00 did so correctly. Fixed bug in choosing most likely model using AIC. Unpaired Y values in all other data sets in the table. Fixed the problem when Prism did not interpolate X values if unpaired Y values in the first data set were situated lower than Fixed the problem when no value of 95% CI appeared for parameter, when upper limit of the 95%CI interval went to infinity. Fixed the problem when a wrong model was preferred by AICc comparison, when 'weighted' fit was performed. Fixed the wrong initial value for 'Mean' parameter in 'Gaussian distribution' equation. Prism now interpolates unknown X values on nonlinear curve, even when fit is'ambiguous'. Fixed the problem when weighting by 1/Y2, Prism 5.00 was stopped by initial values that generate curves with Y=0. Added a button to view details or edit the second equation, selected in the 'Compare' tab in the Parameters dialog of 'Nonlinear regression' This means you can write scripts that export sheets named according to their sheet name.

Scripts can use %S variable which is the name of the current sheet. This lets you find Prism (and other) files instantly, as every word (titles, notes, legends.) in every file will be indexed automatically. The installer now also installs add ons for Google Desktop Search and Windows Desktop Search (part of Vista free download for XP). On the output tab of nonlinear regression, you can now choose how to report interpolated X values when you entered replicate Y unknowns: In X column (like 5.00)) or in Y column (like 4.0, which preserves the arrangement of replicates). If you have any trouble getting the updating to work, submit your request at requesting a link to a full 5.01 installer. While running Prism 5.00, Drop the Help menu, and choose Check For Updates. Release 5.01 fixes a number of problems and adds some minor features.

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