Problem and Solutions in Data Analysis

These solutions will be updated in the LodeStar manual periodically.

Problems related to LodeStar

Problems related to ROOT

  1. 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/ 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/

Problems related to python

  1. unable to open txt file in C++, when the file name is transfered by python:
    • ADratioSvc = Algtask.createSvc("KM2ACharCalSvc/myCharSvc");
    •"InputFileName").set("KM2AADC-20200220.txt ") reason: There is a space in char: "KM2AADC-20200220.txt "

Problems related to Data

  1. OUtputSvc problem:
Algtask:OutputSvc.initialize DEBUG: Initializing RootOutputSvc...
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.

  1. 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.

-- Chengguang ZHU - 2019-12-18


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Topic revision: r10 - 2020-04-15 - ZhuChengguang
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