Dear Michele Dolfi,
 I meet such error for two times. The system informs me that dmrg.exe has an error. The information contains "ReadDiagDataFromFile". I wonder whether it is the case: while dmrg runs, it saves some temporary datas, which may be saved to the same folder.

 By the way, recently I use dmrg to calculate the correlation such as b^{\dagger}_i b_j. Since there are complex parameters in the Hamiltonian, the correlation may be complex number. It seems that the present version only return the real part of the measurement. I wonder whether it is the case.

Sincerely,
Huaiming Guo


-----原始邮件-----
发件人: "Michele Dolfi" <dolfim@phys.ethz.ch>
发送时间: 2015年10月5日 星期一
收件人: comp-phys-alps-users@lists.phys.ethz.ch
抄送:
主题: Re: [ALPS-users] A question about the DMRG of alps

Usually writing in the same file is not very common, since each task gets its own output file.

The error that you see usually refers to the second half of the script, i.e. when you load and evaluate the results.
Wen this happens usually something else went wrong in the previous step, i.e. running the actual dmrg program. Do you see any other error message?


Michele

--
ETH Zurich
Michele Dolfi
Institute for Theoretical Physics
HIT G 32.4
Wolfgang-Pauli-Str. 27
8093 Zurich
Switzerland


+41 44 633 78 56 phone
+41 44 633 11 15 fax 





On Oct 4, 2015, at 8:21 AM, 郭怀明 <hmguo@buaa.edu.cn> wrote:

Dear all,
 Recently I use dmrg of alps. I run three dmrg programs simultaneously and sometimes I get the following information, which stop the program.
 I raise a question: since the dmrg write files while it is running, is there a problem when several programs run? These program may wirte the same files to the same folder, which will cause a problem. (I use the alps in windows 7).
 Thank you very much.

Sincerely,
Huaiming Guo
 





The group '/spectrum' does not exist.
Traceback (most recent call last):
  File "C:\Program Files\VisTrails\Python27_64\lib\site-packages\pyalps\load.py"
, line 269, in ReadDiagDataFromFile
    if 'results' in self.h5f.list_children(respath):
PathNotFound: The group '/spectrum' does not exist.