According to Microsoft:
The Win32 file system limit is 260 characters.
Win32 application programming interfaces (APIs) have a maximum path limit of 260 characters. Applications fail when trying to access a namespace that goes beyond that limit. If the path length of a DFS namespace exceeds the Win32 API limit of 260 characters, users must map part of the namespace to a drive letter and access the longer namespace through the mapped drive letter.
Microsoft Reference link about MAX_PATH:
Though this help article was specifically written for Summation Iblaze, the MAX_PATH limitation can also affect all other Accessdata applications.