A valuable answer

Field3D Project server is currently run on top of Windows Server 2008. Therefore basic operating system limitations apply: • < (less than) • > (greater than) • : (colon) • " (double quote) • / (forward slash) • \ (backslash) • | (vertical bar or pipe) • ? (question mark) • * (asterisk) Full reference available (https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx ) It is recommended that users would use files with alphanumeric names. Files with non-alphanumeric characters in their names are accepted, but generated files may have some corrupted characters in their names after pre-processing is complete.