One dimensional problem can lead to a number of errors being reported. Because units checking is so quick, a good strategy for dealing with units errors is to fix the first one that appears, and then check the units again.
If you are working with the Sketch Editor, it is helpful to have the Equation Edit tool loaded onto the Analysis Toolset. The Equation Edit tool opens the Equation Editor positioned on the workbench variable. After reviewing the output of units checking, decide which variable is in error and double click on that variable. This will put the variable into the workbench. Clicking on the Equation Edit tool on the Analysis Toolbar will open the Equation Editor on that variable.
If you are working with the Text Editor then be sure the status bar has Entrain showing:
If you do not see Entrain, click on the button that says No-entrain to move the Text Editor into entrain mode. After performing units checking, review the errors and double click on the variable that you think needs fixing. The Text Editor will automatically position the cursor at this variable. Correct the units then check again.
Often checking the units of measure for a single variable can remove several errors. However, sometimes fixing one error will cause several others. Thus the number of units errors reported can actually go up. Nonetheless, if you are persistent and keep at it you will eventually get the message: