Calculation issues for vertical vessels in SW6-V6.0

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I'm a beginner with SW6. In the calculations for vertical vessels, I have the following questions: 1. When specifying the mixer, the number of mixers cannot be changed; it can only be 1. That is, only calculations for single-layer mixing can be performed. 2. After the cylinder data is entered, it is displayed during calculation that the input data for the inner cylinder is incorrect. But inspections found no problems. Here is the input data. Please have an expert answer this immediately. Thank you. Vertical container – Main parameters of the inner cylinder
Design pressure, P (MPa): 0.8
Type of pressure test: Hydrostatic test
Design temperature, t (°C): 175
Test pressure value, PT (MPa): 0
Inner diameter of the equipment, Di (mm): 1800

Parameters of the jacket
Design pressure, P (MPa): 0
Type of pressure test: Hydrostatic test
Design temperature, t (°C): 0
Test pressure value, PT (MPa): 0
Inner diameter of the equipment, Di (mm): 0

Cylinder data
Material name: Q245R
Allowable stress at design temperature, s]t (MPa): 135.5
Material type: Plate
Yield strength at room temperature, ss (MPa): 245
Allowable stress at room temperature, s] (MPa): 148
Negative deviation of the steel plate, C1 (mm): Not specified; assumed to be 0
Nominal thickness (mm): 0
Cylinder length (mm): 2.65
Corrosion allowance, C2 (mm): 3
Coefficient for longitudinal weld joints, f: 0.85
Static pressure of liquid column (MPa): 0

Data for external pressure
Calculated length of the outer-pressure cylinder, L (mm): 0
Is a reinforcement ring installed? No
Reinforcement ring data
Type of reinforcement ring:
Moment of inertia of the reinforcement ring’s cross-section, Ix (mm4): 0
Specifications of the reinforcement ring:
Distance from the centroid of the reinforcement ring’s cross-section to the top, d (mm): 0
Half of the sum of the calculated lengths of the cylinders on either side of the reinforcement ring, Ls (mm): 0
Distance from the centroid of the reinforcement ring to the inner or outer wall of the cylinder, c (mm): 0
Cross-sectional area of the reinforcement ring, As (mm2): 0

Data for the upper head
Data for the elliptical head
Material type: Plate
Height of the curved surface, hI (mm): 450
Material name: Q245R
Height of the straight edges, h2 (mm): 25
Allowable stress at test temperature, s] (MPa): 148
Negative deviation of the steel plate, C1 (mm): Not specified; assumed to be 0
Allowable stress at design temperature, s]t (MPa): 135.5
Corrosion allowance, C2 (mm): 1.5
Weld joint coefficient, f1:
Nominal thickness, dn (mm): 0
Static pressure of liquid column (MPa): 0

Data for the lower head
Data for the elliptical head
Material type: Plate
Height of the curved surface, hI (mm): 450
Material name: Q245R
Height of the straight edges, h2 (mm): 25
Allowable stress at test temperature, s] (MPa): 148
Negative deviation of the steel plate, C1 (mm): Not specified; assumed to be 0
Allowable stress at design temperature, s]t (MPa): 135.5
Corrosion allowance, C2 (mm): 3
Weld joint coefficient, f1:
Nominal thickness, dn (mm): 0
Static pressure of liquid column (MPa): 0.025

Stirring shaft – Design and structural parameters
Motor power (kW): 11
Density of the liquid inside the container (kg/m3): 1330
Design speed (rpm): 85
Type of medium: Liquid-solid phase
Type of shaft seal: Double-end mechanical seal
Properties of the medium: Ordinary materials
Type of shaft calculation: Rigid shaft
Shaft support condition: Cantilever shaft
Allowable radial displacement at the shaft seal (mm): 0.285
Balance accuracy class G (mm/s): 16
Allowable torsional angle of the shaft (°/m): 0.35
Difference between the shaft diameter at the cantilever end and the shaft diameter between the two bearings (mm): 0
Allowable radial displacement at the end of the cantilever end (mm): 0
Shaft installation type: Inserted shaft
Support coefficient K2 at the drive side pivot: 0

Material parameters of the stirring shaft
Design temperature (°C): 175
Shaft material: 35
Yield limit of the shaft material at design temperature (MPa): 215
Strength limit of the shaft material at design temperature (MPa): 530
Elastic modulus of the shaft material at design temperature (MPa): 198000
Shear elastic modulus of the shaft material at design temperature (MPa): 76153.8
Density of the shaft material (kg/m3): 7800

Stirrer and other design parameters
Diameter of the solid shaft or outer diameter of the hollow shaft, d (mm): 0
Angle between the axis of the cylinder and the shaft installation axis (°): 0
Efficiency of the transmission device: 0.9
Type of shaft structure: Solid shaft
Type of bearing A: Rolling bearing
Type of bearing B: Rolling bearing
Type of stirrer: Tilting blade type
Number of stirrers: 1
Distance from the shaft seal to bearing B, X (mm): 390
Distance between the two bearings, A (mm): 810
Coefficient of radial force of the fluid, K1: 0.48

Data for the first stirrer
Diameter of the blades (mm): 1000
Weight of the stirrer (kg): 25
Angle of inclination of the blades (°): 45
Distance from the stirrer to bearing B on the drive side, Li (mm): 2750
Width of the blades (mm): 140
Design power of this stirrer (kW): 0
Additional mass coefficient: 0.31
Axial force (N): 0
Direction in which the medium pushes the stirrer axially: Pressure