Problem with running UDF of linux

Tomsho · June 10, 2019, 04:53

Hi all,

I'm building my simulation on Win10 with FLUENT 19.2. After my .cas file is done I transfer it to linux for the calculation, also running FLUENT 19.2.

I have a problem when I try to use UDF. I write my UDF in win10 using visual studio and then I compile it, check it works fine and then I move the .cas file to linux. previously i manage somehow to make the cas file auto compile the UDF and creating the libudf file. and it worked perfectly.

now when i try to do the same thing I get an error that auto compile is skipped.

when I try to compile the UDF on linux I get the following warning:
make[3]: Leaving directory `/home/shockner/FLUENT/laser_heat/full_sys/k-e std for thesis/Re 5900/libudf/lnamd64/3ddp_node' make[2]: warning: Clock skew detected. Your build may be incomplete.

is it normal?

how can I make the auto-compilation to work?

Thanks in advance

pakk · June 12, 2019, 08:38

The problem seems to be that your two computers (the windows machine and the linux machine) have clocks that don't agree. Specifically: the windows machine is set at a newer time than the Linux machine.

The file (udf file) that you wrote on the windows machine was made on (for example) 15 June 2019. The clock on your Linux machine thinks that it is 12 June 2019. The compiler then sees that your file is from "the future", and complains.

Solution: open the file on your linux machine, and save it. ("touch yourfile.c" should also work.)

Tomsho · June 12, 2019, 13:59

I will try it, Thanks

June 10, 2019, 04:53	Problem with running UDF of linux	#1
Tomsho New Member Join Date: Dec 2017 Posts: 12 Rep Power: 8	Hi all, I'm building my simulation on Win10 with FLUENT 19.2. After my .cas file is done I transfer it to linux for the calculation, also running FLUENT 19.2. I have a problem when I try to use UDF. I write my UDF in win10 using visual studio and then I compile it, check it works fine and then I move the .cas file to linux. previously i manage somehow to make the cas file auto compile the UDF and creating the libudf file. and it worked perfectly. now when i try to do the same thing I get an error that auto compile is skipped. when I try to compile the UDF on linux I get the following warning: make[3]: Leaving directory `/home/shockner/FLUENT/laser_heat/full_sys/k-e std for thesis/Re 5900/libudf/lnamd64/3ddp_node' make[2]: warning: Clock skew detected. Your build may be incomplete. is it normal? how can I make the auto-compilation to work? Thanks in advance

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June 12, 2019, 08:38		#2
pakk Senior Member Join Date: Nov 2013 Posts: 1,965 Rep Power: 27	The problem seems to be that your two computers (the windows machine and the linux machine) have clocks that don't agree. Specifically: the windows machine is set at a newer time than the Linux machine. The file (udf file) that you wrote on the windows machine was made on (for example) 15 June 2019. The clock on your Linux machine thinks that it is 12 June 2019. The compiler then sees that your file is from "the future", and complains. Solution: open the file on your linux machine, and save it. ("touch yourfile.c" should also work.)

June 12, 2019, 13:59		#3
Tomsho New Member Join Date: Dec 2017 Posts: 12 Rep Power: 8	I will try it, Thanks