关于利用vc进行ansys二次开发

Edwardseu

在使用vc进行二次开发时，调用ansys，在遇到某些命令出现如下错误，本人使用的是ansys11版本。
emunit,epzro,eps0! 选用用户定义的相对介电常数，8.854e-6，比标准的小6个数量级。
! The EMUNIT command is either not available for this version of ANSYS or  the appropriate product was not selected for this session.
et,2,109,1,  ! tran109  2D机械电耦合单元，支持单元morph
! The element option TRANS109 was either not ordered with this ANSYS  installation or the appropriate product was not selected for this    session.
ET,1,PLANE53
! The element option PLANE53 was either not ordered with this ANSYS installation or the appropriate product was not selected for this  session.  
et,2,126,,2,0, ! tran126机械电耦合单元，支持单元morph
The element option TRANS126 was either not ordered with this ANSYS installation or the appropriate product was not selected for this   session.
这些命令在ansys里直接使用时没有任何错误。
但是采用vc调用就出现了错误，踌躇啊，有没有大侠相救，不甚感激。