help!udf compile error

June 19, 2005, 23:40

hello,every cfder.i've got a question to ask.

when i compile the udf,there is no error messages,but when i initial the fluid domain and iterate to compute.there exist the error messages:

Error: Floating point error: invalid number

what does it mean?who can give me some suggestion?

thank u very much!

June 20, 2005, 04:51

Hi, I had the same experience with you. Maybe there is a number divided by "0". For exmaple: there is something like this :C_R(c,t)/C_U(c,t) in your UDF; when you initialized C_U(c,t)with zero,the programm will stop.You need to rewrite your UDF, maybe like this C_R(c,t)/(C_U(c,t)+0.0000000001). Hope it helps.

Joey

June 20, 2005, 07:49

Thanks,

i'll get a try!

June 20, 2005, 20:38

thank you,Joey.

your suggestion is really helpful.

June 21, 2005, 00:05

If your UDF is long engouh, you will have to trace your code line by line. That's really a painful procedure. Good luck!

June 19, 2005, 23:40	help!udf compile error	#1
Fred Guest Posts: n/a	hello,every cfder.i've got a question to ask. when i compile the udf,there is no error messages,but when i initial the fluid domain and iterate to compute.there exist the error messages: Error: Floating point error: invalid number what does it mean?who can give me some suggestion? thank u very much!

June 20, 2005, 04:51	Re: help!udf compile error	#2
Joey Guest Posts: n/a	Hi, I had the same experience with you. Maybe there is a number divided by "0". For exmaple: there is something like this :C_R(c,t)/C_U(c,t) in your UDF; when you initialized C_U(c,t)with zero,the programm will stop.You need to rewrite your UDF, maybe like this C_R(c,t)/(C_U(c,t)+0.0000000001). Hope it helps. Joey

June 20, 2005, 07:49	Re: help!udf compile error	#3
Fred Guest Posts: n/a	Thanks, i'll get a try!

June 20, 2005, 20:38	Re: help!udf compile error	#4
Fred Guest Posts: n/a	thank you,Joey. your suggestion is really helpful.

June 21, 2005, 00:05	Re: help!udf compile error	#5
Joey Guest Posts: n/a	If your UDF is long engouh, you will have to trace your code line by line. That's really a painful procedure. Good luck!

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