svpost requires that the start and increment values creates a time series that includes the stop value

[ktbolt]

When creating an average_result.vtp file you must set the start and increment values to creates results time series that includes the stop value.

For example, start=10, stop=100, inc=40 creates the files

all_results_00010.vtp
all_results_00010.vtu
all_results_00050.vtp
all_results_00050.vtu
all_results_00090.vtp
all_results_00090.vtu

but no average_result.vtp file.

However, start=10, stop=100, inc=30 creates the files

all_results_00010.vtp
all_results_00010.vtu
all_results_00040.vtp
all_results_00040.vtu
all_results_00070.vtp
all_results_00070.vtu
all_results_00100.vtp
all_results_00100.vtu
average_result.vtp

the average_result.vtp file is created because the last time series file equals the stop value.