git flow cannot find command git

[Hopcraft]

my os is windows 7 and when  click the git-flow menu i encounter the following errors: 

sh.exe C:\Users\hopcraft\AppData\Local\Atlassian\SourceTree\gitflow_local\gitflow\git-flow init -d
C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 56: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/gitflow-common: line 161: git: command not found
Using default branch names.

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/gitflow-common: line 161: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/gitflow-common: line 73: git: command not found

No branches exist yet. Base branches must be created now.

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 93: git: command not found

Branch name for production releases: [master]

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 131: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/gitflow-common: line 166: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/gitflow-common: line 73: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 146: git: command not found

Branch name for "next release" development: [develop]

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 188: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 197: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 198: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/gitflow-common: line 73: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/gitflow-common: line 74: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 218: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/gitflow-common: line 161: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 228: git: command not found

How to name your supporting branch prefixes?

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 246: git: command not found

Feature branches? [feature/]

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 254: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 259: git: command not found

Release branches? [release/]

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 267: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 273: git: command not found

Hotfix branches? [hotfix/]

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 281: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 287: git: command not found

Support branches? [support/]

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 295: git: command not found

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 301: git: command not found

Version tag prefix? []

C:/Users/hopcraft/AppData/Local/Atlassian/SourceTree/gitflow_local/gitflow/git-flow-init: line 309: git: command not found

[Sócrates Medina]

 the same problem, waiting for an answer