Permanent I/O error occurred

huim

小弟初写带Subfile的RPG 程序，遇到一个问题:

在不停按PageDown键时，屏幕内容也更新，但一定次数后，会报如下错误

Message . . . . :   Permanent I/O error occurred (C G S D F).               
Cause . . . . . :   The RPG program PGM000R in library CEPGM at statement 240
  detected a permanent (not recoverable) file, session, or device error.  The
  session, device and/or program has been stopped. Examine the major/minor   
  return code value to determine the specific error that occurred. If the   
  major return code is 80 then a system or file error occurred and programmer
  action is required to fix the problem. If the major return code is 81 then
  session or device error occurred, but use of another session or device may
  be successful.                                                            
Recovery  . . . :   Enter C to cancel, G to continue processing at *GETIN, S
  to obtain a system dump, or D to obtain an RPG formatted dump.            
Possible choices for replying to message . . . . . . . . . . . . . . . :     
                                                                       More..

请问这是为什么？

huim

贴出代码来，好像会把空格给TRIM掉，看起来极不舒服？

怎么贴代码啊？