Time units ns and ps in Prime - a bug?

[ValeryOchkov]

I would like to use in my Prime-sheet time units ns (nano-) or ps (pico-) from the list of built-in units but:

Is it a bug?

[Werner_E]

No problem here with Prime 3.0.

I can type the units manually or chose them from the Units menu - they always work as expected.

[AlvaroDíaz]

Hi Valery, Werner.

It's a bug in 3.1, I have ns and ps undefined too.

Best regards.

Alvaro.

[LucMeekes]

In my Prime 3.1 express  the 'ps' works, and can be chosen from the units menu.

Luc

[ValeryOchkov]

Open please the attached Prime 3.1 sheet with undefined ns and ps

When I open new sheet - all is ok with ns and ps.

When I open attached sheet - problems with ns and ps.

[LucMeekes · Accepted solution]

Found it.

The unit system is set to CGS. If you set it to SI, ps and ns are defined

Luc

[LucMeekes]

And YES it's a bug...PTC, because even in a CGS system, ps should be allowed (as should 'fs', 'as' and below).

And it's a bug even more because ps is offered from the units table, also when the units system is set to CGS.

Luc

[ValeryOchkov]

What units do not work in CGS?

What is a logic here?

[LucMeekes]

What's the logic in a bug?