I installed meep on both my desktop (Scientific Linux, meep 0.20.3 was installed from compiling the source) and laptop (Ubuntu 8.10, meep 0.10-2 was installed from precompiled meep package). The problem is when I specify the dielectric properties using "(make medium (epsilon....", there is no issue with latest meep 0.20.3. However, the same scheme code complains that "ERROR: Unbound variable: medium". So I changed "medium" to be "dielectric" to have a try. No problem with the dielectric material. But for metals, it shows "ERROR: Unbound variable: D-conductivity". How to specify metal material in meep ver 0.10-2? Thank you!!
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