Value shown as asterisk in report

Hi

I have an issue with a report. Some of the values are shown as asterisk ('*').

It happens on some of the calculated key figures. One example is:

y = (abc)/d

Where a, b, c and d all should be time (hours).

Sometimes y is shown as "x ERR/H" (I guess this is because a, b and/or c are loaded incorrectly regarding their units. But sometimes it is also shown as '*'. When I highlight the field in Excel/BEx I am able to see the value in the "expression field" in the top. And it is the correct value if I compare it to a LISTCUBE.

Hope you can help

/Karsten