我在Windows 2012 Server上测试jruby（1.7.4）中的prawn（1.3.0）。
这个简单的文档创建测试会抛出一个未知错误。
有没有人对虾，jruby和Windows有任何经验？任何有关排除此错误的帮助都将非常感激。
require 'prawn'
Prawn::Document.generate("prawn_test.pdf") do
text "Hello world."
end
SystemCallError: Unknown error - Unknown Error (20047) - -1
size at org/jruby/RubyFile.java:1081 render_body at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/pdf-core-0.4.0/lib/pdf/core/document_state.rb:69
each at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/pdf-core-0.4.0/lib/pdf/core/object_store.rb:70
each at org/jruby/RubyArray.java:1617
each at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/pdf-core-0.4.0/lib/pdf/core/object_store.rb:69 render_body at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/pdf-core-0.4.0/lib/pdf/core/document_state.rb:68 render_body at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/pdf-core-0.4.0/lib/pdf/core/renderer.rb:192
render at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/pdf-core-0.4.0/lib/pdf/core/renderer.rb:157
render at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/prawn-1.3.0/lib/prawn/document.rb:356 render_file at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/prawn-1.3.0/lib/prawn/document.rb:364
open at org/jruby/RubyIO.java:1148 render_file at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/prawn-1.3.0/lib/prawn/document.rb:364
generate at c:/jruby-1.7.4/lib/ruby/gems/shared/gems/prawn-1.3.0/lib/prawn/document.rb:143
(root) at C:\Users\hshields\WebApps\taskmodules\prawn_test.rb:3 [Finished in 6.4s]