我正在尝试在Windows 10上使用Active Perl 5.28.1运行Perl脚本。它目前在Windows 7上使用Active Perl 5.8.8可以运行。但是当我尝试运行它时，出现以下错误：
Can't locate Switch.pm in @INC (you may need to install the Switch module) (@INC contains: C:\Perl\lib C:/Perl64/site/lib C:/Perl64/lib) at fds_propagator_with_collision_ephem.pl line 108.
我试图安装Switch.pm。我打开了cpan并执行了install Switch.pm命令。
但是，我得到了以下信息：
C:\Users\rdirosar>cpan
Loading internal logger. Log::Log4perl recommended for better logging
cpan shell -- CPAN exploration and modules installation (v2.20)
Enter 'h' for help.
cpan> install Switch.pm
Reading 'C:\Perl64\cpan\sources\authors\01mailrc.txt.gz'
Use of uninitialized value $command in concatenation (.) or string at C:\Perl64\lib/CPAN/Tarzip.pm line 163, <IN> line 1.
'-qdt' is not recognized as an internal or external command,
operable program or batch file.
............................................................................DONE
Reading 'C:\Perl64\cpan\sources\modules\02packages.details.txt.gz'
Use of uninitialized value $command in concatenation (.) or string at C:\Perl64\lib/CPAN/Tarzip.pm line 163.
'-qdt' is not recognized as an internal or external command,
operable program or batch file.
Warning: Your C:\Perl64\cpan\sources\modules\02packages.details.txt.gz does not contain a Line-Count header.
Please check the validity of the index file by comparing it to more
than one CPAN mirror. I'll continue but problems seem likely to
happen.
Warning: Your C:\Perl64\cpan\sources\modules\02packages.details.txt.gz does not contain a Last-Updated header.
Please check the validity of the index file by comparing it to more
than one CPAN mirror. I'll continue but problems seem likely to
happen.
.Could not split line["┬0\cL²\cU\c?└'≈\cCé"]
Could not split line["c▐X'Γπ"├█\cP\cE?▀&δ┌╠5α%â╛mτl∞Bô⌠ñg▒R\cI¥\cT\cP╘≈\cX."]
Could not split line["V╟\c]\$≈»1"]
Could not split line["a\cVk\cQ0y│ôδNj+╒1<c;¼òPb╪Zà⌠∞\cBl≥┤h\cRU\cPFÄ┴▄4û\cIƒ\@⌐╜─b*QZ\$lEX╞╔■î>∩îÅ=\cF┬N;│¼-\cZu¿fÆh\eD"]
Giving up parsing your C:\Perl64\cpan\sources\modules\02packages.details.txt.gz, too many errorsReading 'C:\Perl64\cpan\sources\authors\01mailrc.txt.gz'
Use of uninitialized value $command in concatenation (.) or string at C:\Perl64\lib/CPAN/Tarzip.pm line 163.
'-qdt' is not recognized as an internal or external command,
operable program or batch file.
............................................................................DONE
Reading 'C:\Perl64\cpan\sources\modules\02packages.details.txt.gz'
Use of uninitialized value $command in concatenation (.) or string at C:\Perl64\lib/CPAN/Tarzip.pm line 163.
'-qdt' is not recognized as an internal or external command,
operable program or batch file.
Warning: Your C:\Perl64\cpan\sources\modules\02packages.details.txt.gz does not contain a Line-Count header.
Please check the validity of the index file by comparing it to more
than one CPAN mirror. I'll continue but problems seem likely to happen.
Warning: Your C:\Perl64\cpan\sources\modules\02packages.details.txt.gz does not contain a Last-Updated header.
Please check the validity of the index file by comparing it to more
than one CPAN mirror. I'll continue but problems seem likely to
happen.
.Could not split line["┬0\cL²\cU\c?└'≈\cCé"]
Could not split line["c▐X'Γπ"├█\cP\cE?▀&δ┌╠5α%â╛mτl∞Bô⌠ñg▒R\cI¥\cT\cP╘≈\cX."]
Could not split line["V╟\c]\$≈»1"]
Could not split line["a\cVk\cQ0y│ôδNj+╒1<c;¼òPb╪Zà⌠∞\cBl≥┤h\cRU\cPFÄ┴▄4û\cIƒ\@⌐╜─b*QZ\$lEX╞╔■î>∩îÅ=\cF┬N;│¼-\cZu¿fÆh\eD"]
Giving up parsing your C:\Perl64\cpan\sources\modules\02packages.details.txt.gz, too many errorsLockfile removed.
C:\Users\rdirosar>
我尝试删除以下文件：
C:\Perl64\cpan\sources\authors和C:\Perl64\cpan\sources\modules\
但这没有效果，如果目录中有文件，则它们会根据需要进行更新。我做错了什么？ 罗伯特
注意：我发现需要向文本添加一些回车/换行符，否则我将收到一个关于代码格式不正确的错误消息。
Switch，而不是Switch.pm（那是文件名）。请注意，在Perl中，switch-case的概念具有微妙的复杂性（参见此处），而Switch是这方面的一个旧实现，存在着更严重的问题。 - Grinnz