[求助]：commands may not be nested more than 4 deep

catwang_G

r14,为什么有时候我在执行某个命令时会出现以下错误信息：commands may not be nested more than 4 deep.
它的意思应该是命令嵌套不能超过4层。但对它这个嵌套我不太理解。是一个命令里调用了超过4命令？应该不会。还是命令里套命令，超过了4层，这就很难抑制了，而且为什么是在某个命令要执行几遍才出错，可以说没什么规律。这个错误一出来，程序就要退出了。
不知哪位大虾遇到过这种情况？

rave

最初由 catwang_G 发布
[B]r14,为什么有时候我在执行某个命令时会出现以下错误信息：commands may not be nested more than 4 deep.
它的意思应该是命令嵌套不能超过4层。但对它这个嵌套我不太理解。是一个命令里调用了超过4命令？应该不会。... [/B]

与R14无关的，在R15中也有可能出现．
你看看下面就知道原因了.

[B]Note[/B]
The acedCommand() function supports re-entrance up to four levels deep. AutoLISP does not support re-entrance, so if acedCommand() is called from within a function that has been executed via the AutoLISP/acedDefun() interface, there is no need to worry about re-entering acedCommand(). Commands registered via acedRegCmds->addCommand(), however, do support re-entrance and there is no way to determine how many levels of re-entrance are currently in effect to avoid exceeding the limit of four levels. If you must use acedCommand() in functions registered via acedRegCmds->addCommand(), you can avoid exceeding the re-entry limit of four levels, if you:
  1. Do not use acedCommand() in functions registered as ACRX_CMD_TRANSPARENT
  2. Do not use acedCommand() to execute any other commands registered via acedRegCmds->addCommand()
  3. Do not use acedCommand() to execute anything that will allow user interaction

你多半是在命令函数中没有正确使用acedCommand / ads_command,违背上面的3条