Project ID field is 20 characters long in AX 2012 R2 CU7.
AOT – Data Tables – Extended Data Types – ProjID.
The project ID length error sometimes occurs even when the
previous project ID is of length of 17.
This is because the moment the next
project is created, the ‘Sub-project ID format’ field from the project is
filled with the 'Default sub-project ID format' from the project parameters.
System validates that assuming that the
next project is created and shows the project length error. To get around this
problem, go to project parameters remove the default sub-project ID format setup and then
setup the sub-project.
When the limit of the project id length reaches the Sub-project
ID format field displays blank. Even if the user tries to enter # in it
system errors.
Thanks
Sarang