Problem and Solutions in Data Analysis

These solutions will be updated in the LodeStar manual periodically.

Problems related to LodeStar

Problems related to ROOT

使用LodeStar的dataModel存储的root文件，使用root交互界面打开后，无法通过Show或者Scan等命令查看event的内容

• 在setup LodeStar 大环境后，通常我们需要运行当地package中的cmt/setup.sh 来建立本地环境。这导致同名的DataModel类定义被root辨识，和打开的文件中用DataModel类名作为tree名的tree发生同名冲突。输入DataModel的类名后会自动的被辨识成类名（变成蓝色显示），从而无法引用tree。
• 解决方案：不要运行当地package中的cmt/setup.sh

Problems related to python

unable to open txt file in C++, when the file name is transfered by python:

• ADratioSvc = Algtask.createSvc("KM2ACharCalSvc/myCharSvc");
• ADratioSvc.property("InputFileName").set("KM2AADC-20200220.txt ")
• reason: There is a space in char: "KM2AADC-20200220.txt "

When run the ananlysis job, the error log shows at the beginning:

• Error in cling::AutoloadingVisitor::InsertIntoAutoloadingState:
• Missing FileEntry for LHRecHeader.h
• requested to autoload type LHRecHeader
• Solution: go to LHRecEvent pacakge, remove all dictionary files and re-compile

Problems related to Data

OutputSvc problem:

• Algtask:OutputSvc.initialize DEBUG: Output stream list:
• Algtask:OutputSvc.initialize DEBUG: Path: /Event/LHCaliEvent ==> File name: test2.root
• * Break * segmentation violation
• Not clear for the reason, but in constructor, if allocate memory for HitsE : " HitsE =new TClonesArray (...)" , the crash disappear.

Why when register the datamodel to outputSvc, the constructor runs twice and destructor runs once

• Algtask:OutputSvc.initialize DEBUG: Path: /Event/RawEvent ==> File name: test2.root
• In RawEvent ()
• In RawEvent ()
• In ~RawEvent()
• Algtask:OutputSvc.initialize DEBUG: Successfully initialized.

download problem

problem:

Using the example of event reconstruction :LHKm2aReco ,and source ./bashTools/downloadPackages.h ./bashTools/Packages.txt find a problem that enter SVN password ,it stoped.and reminding you stored your password unencrypted?(yes/no)ATTENTION! Your password for authentication realm:svn: OPTIONS of 'http://202.122.38.82/People/yuyh/tags/KM2ACharCalSvc/v1.0': authorization failed: Could not authenticate to server: rejected Basic challenge (http://202.122.38.82)

solution: enter your home directory and edit .subversion/server and setting the value of the 'store-plaintext-passwords' option to "yes" .inline 113,156 .Be sure to write to the top without Spaces

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