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Re: Incompatible units?

  • To: mathgroup at
  • Subject: [mg97738] Re: [mg97733] Incompatible units?
  • From: "David Park" <djmpark at>
  • Date: Fri, 20 Mar 2009 02:39:26 -0500 (EST)
  • References: <7631180.1237458918195.JavaMail.root@m02>

Why don't you give us a complete set of evaluable code, including loading
the package. Without that it is difficult to see what is happening.

David Park
djmpark at  

From: Mathias Lindner [mailto:mathias.lindner at] 


Today I struggled with the units package - again...

Let me show you what I did:

	Dynamic[Subscript[\[Tau], p]]
	Subscript[l, case]
	\[Lambda] = \Convert[Subscript[l, case]/Dynamic[Subscript[\[Tau],
p]], 1]

This input results in:

	27.4889 Meter Milli
	281 Meter Milli

	Convert::incomp : Incompatible units in (281 Meter Milli)/(27.4889 
Meter Milli) and 1.
	(281 Meter Milli)/(27.4889 Meter Milli)

If I don't use dynamic but constant tau_p everything is fine...
So Mathematica isn't able to to reduce this fraction? What's the reason 
for this behaviour and what can I do about it?

Thanks for your help!


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